fixed faulty case in references to NuGet.exe and NuGet.targets
removed block of NuGet.targets for 'Release Mono'
Merge remote-tracking branch 'official/master'
Merge branch 'master' of https://github.com/MediaBrowser/MediaBrowser
cleaned up left overs & removed last unnecessary mono filters
Merge pull request #890 from gsnerf/master

changes to allow mono builds (in linux)