Initial check-in for Spacewar sample. (take 2)

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

Also added a mossing nuget .packages file for the NeonShooter sample