Remove hardcoded path of nuget cache in cs proj file (#37)

* Keep track of any error cases encountered when attempting to deminify a StackFrame. Instead of returning a list of StackFrames in DeminifyStackTraceResult, we will return a StackFrameDeminificationResult, which contains the deminified StackFrame as well as an enum indicating if any error cases were hit. This result can be used to help provide information of any error cases in the SourceMapToolkit without having to debug.

* Updating documentation.

* Missed merges

* Add back StackFrameDeminifierUnitTests with test coverage to make sure StackFrameDeminificationResults are recorded correctly.

* Undo hint path for nuget packages from local box

* Fix up SourceMapToolkil csproj

* Documentation cleanup

* fix type in documentation

* Do not do Bitwise or on DeminificationError, since the Flags attribute was removed in a previous commit. Additionally update the NoFunctionMapProvided error to be NoSourceCodeProvided since FunctionMap is not

* If we fail to get the deminified stackframe method, we shouldn't attempt to get the source position or file path

* Remove hard coded local nugetcache path

* Revert readme to line up with upstream repository

src/SourcemapToolkit.CallstackTestApp/SourcemapToolkit.CallstackTestApp.csproj

@@ -1,7 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project ToolsVersion="12.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <Import Project="D:\NugetCache\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.0\build\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props" Condition="Exists('D:\NugetCache\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.0\build\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props')" />
-  <Import Project="D:\NugetCache\Microsoft.Net.Compilers.1.0.0\build\Microsoft.Net.Compilers.props" Condition="Exists('D:\NugetCache\Microsoft.Net.Compilers.1.0.0\build\Microsoft.Net.Compilers.props')" />
   <Import Project="..\..\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.0\build\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props" Condition="Exists('..\..\packages\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.1.0.0\build\Microsoft.CodeDom.Providers.DotNetCompilerPlatform.props')" />
   <Import Project="..\..\packages\Microsoft.Net.Compilers.1.0.0\build\Microsoft.Net.Compilers.props" Condition="Exists('..\..\packages\Microsoft.Net.Compilers.1.0.0\build\Microsoft.Net.Compilers.props')" />
   <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />