Added NuGet reference to 'MSBuild.Microsoft.VisualStudio.Web.targets' to eliminate the requirement on VisualStudio being installed.

#19 Build script fails if VS2012 isn't installed.
- Added missing binaries, Sneaky 'gitignore_global.txt' courtesy of
Atlassian SourceTree me thinks was ignoring them.
Merge remote-tracking branch 'upstream/master'
Merge pull request #21 from lholman/master

Added NuGet reference to 'MSBuild.Microsoft.VisualStudio.Web.targets'…