Initial check-in for Spacewar sample.

* Touch game controls implemented (tested working on Win 8) - not working on GL build? no touch?
* Input controls need fully updating for menus along with keys
* Only WinGL and Win 8 platforms tested, will expand shortly
* Shaders need a serious look at, actually getting different results on GL and Win 8
Merge pull request #13 from DDReaper/Spacewar_Sample_develop

Initial check-in for Spacewar sample.
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