* Remove comment ifdefs

* Add Microsoft.NET.Sdk.FSharp.props

* Make TargetFrameworks work

* restore {BuildSuffix}

* rename sdk targets and props, refactor project logic into our repo

* wrong name

* Add automagic FSharp.Core reference for coreclr

* Set <DefaultProjectTypeGuid to F# project system guid

* Fix setup

* Fsi.exe should be called fsi.exe systematically. Let's normalize this now.
* Fsi.exe is always called fsiAnyCpu.exe on Mono. Although both are odd names, it's best to use the same as what is already used on case-sensitive file systems. Let's normalize this now.
* Fix dependencies in FSharp.Core nuget description to match project.json
* Simplify propagation of PREFERRED_UI_LANG define

Remove hard-coded paths to SDK folder, and in one case, just update the list of SDKs to look for.

Fixes #561

The errors in #561 stemmed from inability to find the SDK utils, so strong-name validation was not turned off for the assemblies that are usually strong-named.

Fixed errors in config.bat