Initial check-in of Neon Shooter Sample

* Only implemented on GL platform currently (templates exist for other platforms but have not been configured)
* Currently not working, used to function but isn't working with 3.2 Build
Merge branch 'develop' of https://github.com/Mono-Game/MonoGame.Samples into NeonShooter_Sample_develop

Conflicts:
	ContentBuilder/ContentBuilder.csproj
	Samples-Content.sln
	Samples-WindowsGL.sln

Updated post pre-merge of the space war sample for the .sln and .csproj files
Also validated and updated NuGet package dependancies
Merge pull request #12 from DDReaper/NeonShooter_Sample_develop

Initial check-in of Neon Shooter Sample