Improves FSharp.Core selection given a specific .Net Framework.

When a new target framework is selected if the currently selected fsharp.core is not compatible
with the newly selected .net framework then it is selected according to the following:

.NetFrameworks 2.0, 3.0 and 3.5 select fsharp.core, v 2.3.0.0
.NetFramework 4.0 selects fsharp.core v 4.3.0.0
.NetFramework 4.5, 4.51, 4.52 and 4.6 selects fsharp.core 4.4.0.0

If a compatible fsharp.core is selected when a new .netframework is selected then the selection remains unchanged.
.NetFramework 4.5, 4.51, 4.52 and 4.6 are compatible with fsharp.core and 4.3.1.0, 4.4.0.0

Note:
1.  Internal build "copydependencies.proj" needs to be updated with a new SupportedRuntimes.xml location.
2.  OSS supportedruntimes.xml needs to be manually copied to the %ProgramFiles(x86)%\Microsoft SDKs\F#\4.0\Framework\v4.0 directory.
    until OSS vsix installer is updated to integrate the compiler into VS.

Conflicts:
	README.md
	appveyor-build.cmd
	tests/RunTests.cmd

Swap AppVeyor badge for one from http://shields.io/ to match the PR and issue badges.

I didn't see any minimum bar for doc changes; sorry if I missed it.
Conflicts:
	README.md

fixes #3
closes #221

commit d0a610d5a51b40a6bb07be326b8cc40c0410c864
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:41:15 2015 -0800

    Revert stats file

commit 41176f7ff0a09228348b23d7fcb9d5d119bb33cb
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:40:21 2015 -0800

    Small modifications to fit into recent updates

commit 1da7c7d002d124b7e6961e2c1319e20b097166eb
Merge: 95bfc9e3 19d6f8f
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:36:33 2015 -0800

    Merge branch 'updatenunit' of https://github.com/KevinRansom/visualfsharp into KevinRansom-updatenunit

    Conflicts:
    	src/FSharpSource.targets
    	tests/RunTests.cmd

commit 19d6f8f39b3808874c5fbb95af1a9783ff4fdbab
Author: KevinRansom <kevinr@microsoft.com>
Date:   Sat Feb 7 09:43:22 2015 -0800

    merge upstream

Conflicts:
	src/FSharpSource.targets
	tests/RunTests.cmd

closes #223

commit 5cc9375fde48d1b764d066df4ca366b3b5ef8c7f
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 10:29:29 2015 -0800

    Make sure error cases cause nonzero exit code in CI build

commit 08e9a3cd312942f70ee70324d21225f22fef40e1
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 10:25:41 2015 -0800

    Disable line-ending-dependent test from CI

commit c178eefeb399f7cc99324e5acdab9c7d850b2c9c
Author: latkin <latkin@microsoft.com>
Date:   Mon Feb 9 21:27:55 2015 -0800

    Dump the failure log if tests don't pass

commit d11a3d1ad3c3aa1c2fcd8105aaa1d071a04fe20b
Author: latkin <latkin@microsoft.com>
Date:   Mon Feb 9 21:07:50 2015 -0800

    Port over recent updates to build script, so that Perl tests are invoked

commit fb1d37a4c96aded74ce9a5ae5c1e1e410a98e241
Author: latkin <latkin@microsoft.com>
Date:   Mon Feb 9 20:35:49 2015 -0800

    Enable hosted compiler and parallel test execution in CI build

fixes #3
closes #221

commit d0a610d5a51b40a6bb07be326b8cc40c0410c864
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:41:15 2015 -0800

    Revert stats file

commit 41176f7ff0a09228348b23d7fcb9d5d119bb33cb
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:40:21 2015 -0800

    Small modifications to fit into recent updates

commit 1da7c7d002d124b7e6961e2c1319e20b097166eb
Merge: 95bfc9e3 19d6f8f
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 10 12:36:33 2015 -0800

    Merge branch 'updatenunit' of https://github.com/KevinRansom/visualfsharp into KevinRansom-updatenunit

    Conflicts:
    	src/FSharpSource.targets
    	tests/RunTests.cmd

commit 19d6f8f39b3808874c5fbb95af1a9783ff4fdbab
Author: KevinRansom <kevinr@microsoft.com>
Date:   Sat Feb 7 09:43:22 2015 -0800

    merge upstream

Swap AppVeyor badge for one from http://shields.io/ to match the PR and issue badges.

I didn't see any minimum bar for doc changes; sorry if I missed it.

Closes #217

commit 821fbaa007a441e14d28cae51d8c76ef8f55070e
Author: dungpa <phananhdung309@yahoo.com>
Date:   Fri Feb 6 13:52:25 2015 +0100

    Run tests using Perl

commit d87e17b2354d3eec3dc5d0b3f67bfc81815406fc
Author: dungpa <phananhdung309@yahoo.com>
Date:   Fri Feb 6 11:21:22 2015 +0100

    Enable tests using Perl and build VS integration projects

1.  Revert AppVeyor to use Dev 12, until AppVeyor provide Pro support fo...

2.  Update vs projects to eliminate UseNuget build configuration option
3.  Add vsintegration and vsintegrationunittests to build.
    Will add ideunit tests in a later checkin

Vs2015 support

Conflicts:
	appveyor-build.cmd
	tests/RunTests.cmd

fixes #119
closes #197

commit d4dd8389db1e97fe842529257da90a5218b7f195
Author: Vladimir Matveev <vladima@microsoft.com>
Date:   Tue Feb 3 16:20:52 2015 -0800

    added test for settable extension property

commit 5edc7ccacd90b8bbaba28ecdb7f9e5ecb1f3b171
Author: Vladimir Matveev <vladima@microsoft.com>
Date:   Tue Feb 3 16:20:26 2015 -0800

    addressed CR feedback

commit f17c57d250691a37811bdb82b7294b65ddc93676
Author: v2m <desco.by@gmail.com>
Date:   Sun Feb 1 14:55:02 2015 -0800

    added tests for property completion in object creation expressions

commit 38a073426d67da4eb33a8baa070ca8ba9420ea60
Author: v2m <desco.by@gmail.com>
Date:   Wed Jan 28 11:25:09 2015 -0800

    initial revision of completions for properties in 'new' expressions

fixes #109
closes #192

commit 301dfaac156f22edeef5bb55d98288ad774b5d79
Author: dungpa <phananhdung309@yahoo.com>
Date:   Thu Feb 5 09:00:46 2015 +0100

    Update test listing

commit e7f654f016825641f722d0c60a2de53a64b56027
Author: dungpa <phananhdung309@yahoo.com>
Date:   Thu Feb 5 08:42:24 2015 +0100

    Update FSharpQA tests

commit 93bd0997069713d8f0fed10d3af794bf66928e1c
Author: dungpa <phananhdung309@yahoo.com>
Date:   Wed Feb 4 21:35:52 2015 +0100

    Fix language service unit tests

commit adb4fa29eb335b24780c0f311db127ff12882ec1
Author: dungpa <phananhdung309@yahoo.com>
Date:   Wed Feb 4 13:50:18 2015 +0100

    Minor refactoring

commit a8972fe06e181077f1dcfa572b8164b567ac25b8
Author: Anh-Dung Phan <phananhdung309@yahoo.com>
Date:   Sat Jan 31 23:26:29 2015 +0000

    Fix up tests

commit 3fde68d4f709435b4d16b269f80bf6689b9ae5ec
Author: Anh-Dung Phan <phananhdung309@yahoo.com>
Date:   Sat Jan 31 23:05:06 2015 +0000

    Print ParamArray attribute instead of 'params'

    Fixed #109.

1.  add icons to fsharp.project.fharp.dll
2.  Update count of public types 2 were added just after dev 11, test seems to have been permanently broken
3.  ENsure that dll's are comvisible(false)

fixes #102
closes #203

commit 6cc322727c1b7d0ae6a0034c2b9018e64d038794
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Tue Feb 3 15:30:23 2015 +0100

    Do not generate logical type names like "MyNamespace.Test,"

commit b40d937a383c1715c3f052d9674d3bd4f89333a6
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Sun Jan 25 15:08:36 2015 +0100

    Fix demangling of provided types with only default values - fixes #98

commit 515501a9765ab617e2837d7ce36ba06a3cbda1cd
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Sun Jan 25 14:56:45 2015 +0100

    Create test case for #98

commit 55695804d6af78a10ce9543764fec0656687156b
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Sun Jan 25 14:50:04 2015 +0100

    Added some tests to describe current behaviour of NameMangling of provided types

commit be2d1570f925d52f1992324553db1f67f7544057
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Sun Jan 25 14:22:49 2015 +0100

    Extract computeMangledNameWithoutDefaultArgValues to make it testable

commit bbdd2a30fd2637c709eb94ce0e064521341bc9f9
Author: Steffen Forkmann <steffen.forkmann@msu-solutions.de>
Date:   Sun Jan 25 13:13:00 2015 +0100

    Cleanup: removed commented code which uses deleted functions

closes #215

Conflicts:
	DEVGUIDE.md
	README.md
	appveyor-build.cmd
	appveyor.yml
	src/fsharp/FSharp.Core.Unittests/SurfaceArea.net40.fs
	tests/test.lst

fixes #204
closes #205

commit 58daf0401c282958e8ac563afba2abbd7c7464a7
Merge: 9c14a50 c9026a9
Author: latkin <latkin@microsoft.com>
Date:   Wed Feb 4 12:21:42 2015 -0800

    Merge branch 'use-nuget-nunit' of https://github.com/latkin/visualfsharp into latkin-use-nuget-nunit

    Conflicts:
    	appveyor-build.cmd

commit c9026a90e08b3d44f395e6044a12904508383a53
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 13:12:28 2015 -0800

    No need to update the PATH for AppVeyor any more

commit ed4a32f88f427c67cd3bee885d7f6fed8a05a03a
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 13:05:05 2015 -0800

    Use nuget-obtained NUnit everywhere, seamlessly

Conflicts:
	tests/RunTests.cmd

closes #206

commit 2ef867e044e3a42b30ce5ad0971d006459e5c9b4
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 15:15:46 2015 -0800

    Remove GACing from appveyor build

commit af79f865062d8144de1a734787e92cd50a383450
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 13:50:41 2015 -0800

    Restructure LKG dir so that GACing of 2.0.50726.900 runtime is no longer needed

Conflicts:
	DEVGUIDE.md

closes #209

commit 07b96ab0dbe361d139d3127f38b242ce1cf090c8
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 18:23:08 2015 -0800

    Update expected build output path for AppVeyor artifact

commit b71549a46412991e6e9c1d8f3ac068b96aac5ef9
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 16:02:07 2015 -0800

    Change CI so it builds everything in release configuration

fixes #210
closes #211

commit 9a1fed611d6438635e8e745a9817b197b6659ed1
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 19:37:01 2015 -0800

    Removing blank line causing surface area test to fail

commit c2366b220bf36a78fb2f4de801ee1c9f7d93655b
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 18:17:54 2015 -0800

    Only use 12.0 msbuild for master branch

commit e3d83a95d1180fdc7dbcad0094f0c3e4c592459b
Author: latkin <latkin@microsoft.com>
Date:   Tue Feb 3 18:12:44 2015 -0800

    Update branch in appveyor status badge

commit 56fc7c7d5a37acf894de4f679f90ef3599671b72
Author: latkin <latkin@microsoft.com>
Date:   Thu Jan 29 10:04:11 2015 +0000

    Port over AppVeyor support to master branch

Fix NGen command in appveyor build script

2. remove Microsoft.Build binding redirect to ide unittests.dll
3. Retarget enableopensource vsix at VS 12.0 and up
4. Remove tabs from enableopensource vsix,
    which seems to have made it not build on dev 12, and not install in dev 14