MonoGame.Framework GUIDs reverted to previous state with the exception of:

Angle, new GUID generated as it was using the same as the Windows platform
WindowsPhone, new GUID generated as it was using the same as the Windows platform

Fix requested as part of #2560
Replaced GUID's in MonoGame.Framework.Net.definition
Modified as per @tomspillman request
Updated WindowsGL GUID
Merge pull request #2561 from DDReaper/develop_ProjectGuidRevert

MonoGame.Framework GUIDs reverted to previous state as per #2560 request