This adds two scripts that setup a Linux box for building Roslyn. This
represents the steps used to configure our Jenkins CI system for Linux.
The scripts do the following:

- setup.sh: One time machine setup to enable NuGet usage and consumption
  of mono CI builds
- setup-snapshot.sh: Install the latest mono CI package and setup the
  PCL for that build.

These scripts are brand new and should be considered experimental.

closes #2007

Use default item metadata so that this works in C# as well.

Fixes #1876 for C# as well in "The Right Way"(TM).

CodeModel now completely handles Conversion operator declarations

fixed issue where $RootFolder$ and $ShellFolder$ wasn't resolved correctly

Improved code generation for ?. in some scenarios (in particular async)

Changes ObjectPool leak detection to use simple light-up to get the stac...

Fix #1980 : CodeModel was not handling Conversion operator declarations
in few areas. This change addresses these issues

Updating Roslyn compiler toolset

Fix UnreachableException during Debugging

When computing the distance between blocks for EnC, there was a missing case for LabeledStatement, causing UnreachableException. This PR fixes this issue.

new version: 1.0.0-rc2-20150413-02

When computing the distance between blocks, there was a missing case for LabeledStatement, causing UnreachableException. This PR fixes this issue.

Changes ObjectPool leak detection to use simple light-up to get the stack trace (which is nonportable), and fixes a few leaks

Print process output to console instead of results file

Remove PDB helpers from VS

This has a number of small changes necessary for CoreFx support:

- Thread through the client directory to CommonCompiler.  This is
necessary for loading items like the SqmData.
- Move GetAssemblyVersion and GetAssemblyFileVersion into
CommonCompiler.  There is no need to specialize this for each compiler.
- Change the implementation of the above methods to not rely on
Assembly.Location which isn't present in CoreFx.

closes #1974

In certain error cases, like if xunit crashes, it may not produce a test results file.  Instead of writing the process output to the test results xml file, which could be improperly interpreted as xml, write it to the console.  Also, remove add Process.Start call in case of failed xunit process.

Fixed readme to remove broken link for the April's End User Preview (for V...

This API is not available in portable CoreFx.  Fall back to our original
behavior of simply specifying the runtime.  The one exception is in
internal builds where we must respect the COMPLUS flags.

closes #1961

Both compilers support the /utf8output flag to change the output
encoding to UTF8.  The implementation was using Console.OutputEncoding
which is not supported in CoreFx.  Changed the implementation to use the
supported API pairs of OpenStandard* and Set*.

Note: The compiler was also using IsOutputRedirected which isn't
supported on CoreFx and has no portable replacement.  After discussion
with the compiler team we decided to omit this check.  It a check that
is more aimed at preventing the user from making a mistake by not
redirecting the output vs. enforcing an actual constraint.

closes #1970

Codemodel should return only Namespace when asked for CodeNamespace

Give an error when a type argument is inferred as void, and when a return statement has a void expression.

changed preview warning tagger name from "Warning" to "Preview Warning" to reduce confusion between compiler warning tag.

Fix #1923 AbstractCodeType should return only a namespace when asked for
a CodeNamespace but not a Type

added Preview to Warning tagger to make distinction more clear between preview warning and compiler warning.

changed preview warning tagger name from "Warning" to "Preview Warning" to reduce confusion between compiler warning tag.

Avoid generating an empty sequencePoint element in PdbToXml tool

Updates Concord APIs in Roslyn to add new field "CustomTypeInfo"

Make SourceText's CalculateChecksum method private

Updates Concord APIs in Roslyn to add new field "CustomTypeInfo" which is passed between an managed expression complier and a result provider.
This new field is a new value type "DkmClrCustomTypeInfo", which is used to convey complier specific type information that is not represented by .NET data types (such as C#'s 'dynamic' type).
In Roslyn, this commit also updates the ResultProvider's mock implementation of the Concord API and fixes all affected callsites.

The API Environment.CurrentDirectory is not available on CoreFX.
Switching all uses to Directory.GetCurrentDirectory which is an
equivalent API (it is actually how Environment.CurrentDirectory is often
implemented).

closes #1829

This changes the compiler APIs to no longer use
RuntimeVersion.GetRuntimeDirectory to find the path to mscorlib and
System.dll for the following reasons:

- This API is not available in CoreFx and hence blocks our transition.
- This behavior of implicitly referencing mscorlib doesn't have a
logical equivalent in coreclr where there may be no reachable mscorlib
on the machine (think Linux).

The compiler now takes the SDK search directory as a paramater.  The
consmer will be responsible for feeding down the correct value to the
compiler.

This is the first step in resolving issue #1939

closes #1943

Add MSBuild support for AnalyzerDependency items

Set correct checkmarks in "Set Rule Set Severity"