Merge pull request #4808 from tannergooding/master

Updating Roslyn to Toolset Version 1.1.0-beta1-20150825-02.

.nuget/packages.config

 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="Microsoft.Net.Compilers" version="1.1.0-beta1-20150727-01" targetFramework="net45" />
+  <package id="Microsoft.Net.Compilers" version="1.1.0-beta1-20150825-02" targetFramework="net45" />
   <package id="Microsoft.Net.RoslynDiagnostics" version="1.1.1-beta1-20150818-01" targetFramework="net45" />
   <package id="System.Collections.Immutable" version="1.1.36" targetFramework="net45" />
   <package id="System.Reflection.Metadata" version="1.1.0-alpha-00012" targetFramework="net45" />

build/Targets/VSL.Settings.targets

@@ -78,7 +78,7 @@
   <!-- Import the global NuGet packages -->
   <PropertyGroup>
     <ToolsetCompilerPackageName>Microsoft.Net.Compilers</ToolsetCompilerPackageName>
-    <ToolsetCompilerPropsFilePath>$(NuGetPackagesPath)\Microsoft.Net.Compilers.1.1.0-beta1-20150727-01\build\Microsoft.Net.Compilers.props</ToolsetCompilerPropsFilePath>
+    <ToolsetCompilerPropsFilePath>$(NuGetPackagesPath)\Microsoft.Net.Compilers.1.1.0-beta1-20150825-02\build\Microsoft.Net.Compilers.props</ToolsetCompilerPropsFilePath>
     <RoslynDiagnosticsPropsFilePath>$(NuGetPackagesPath)\Microsoft.Net.RoslynDiagnostics.1.1.1-beta1-20150818-01\build\Microsoft.Net.RoslynDiagnostics.props</RoslynDiagnosticsPropsFilePath>
     <AdditionalFileItemNames>$(AdditionalFileItemNames);PublicAPI</AdditionalFileItemNames>
   </PropertyGroup>