Oculus Rift DK2+ support

[axefrog]

My DK2 is sitting on my desk collecting dust. May as well make use of it.

• Ran an OculusWrap test and it works well, though it doesn't have a NuGet package: https://oculuswrap.codeplex.com/
• SharpOVR (http://www.nuget.org/packages/SharpOVR/) has a NuGet package but no samples or documentation. I think it's probably almost exactly the same as OculusWrap so I will need to test it.