Merge pull request #164 from bodicsek/master

Fixing build (xbuild): unused local variable in AutoComplete/SnippetGenerator.cs
Native path sep, ProjectFinder resolve, HintPath
Request filename is always using native path sep.
CSharpProject HintPath extra case handling (only a dir is present).
ProjectFinder resolves a context assembly without a proper full name.
StringExtensions ForceNativePathSeparator always replaces the proper path sep.
Merge branch 'develop' of https://github.com/bodicsek/omnisharp-server into develop