Update to dev release NuGet's

Includes
* New .Net package
* Added Android/iOS/MacOS experimental project templates to main MG NuGet
* Added build specific builds to binaries package (Win 8 x86/x64/ARM/Any) (WinGL x86/x64/Any)

Published as of commit https://github.com/mono/MonoGame/commit/e58c2cef02226c08bb3a132fb90282061914ce29