Move VisualStudio file from Global to main list
Merge missing CSharp/VB settinsg into VisualStudio

The VisualStudio gitignore file was missing a few useful
settings contained in the CSharp and VB.NET gitignore files.
Remove CSharp and VB.NET ignore files

These files were redundant. They had almost exactly the same
settings. They are being replaced by the VisualStudio file.
Ignore .pfx files such as Windows Store Key
Ignore crap from Macs

Cross platform .NET Dev FTW!
Merge pull request #492 from Haacked/consolidate-dotnet-settings

Consolidate CSharp and VB.NET gitignore files into VisualStudio one.