Restore MediaPlayer song and position after resume on WP8
Removed leftover WP8 code
Some more cleanup in MediaPlayer
Simplified WP8 trial mode because the Windows 8 style license information is error-prone
Added bitmap content classes for DXT1,3,5.
DxtBitmapContent is now abstract.
Removed DxtBitmapContent.TryGetFormat (implemented by derived classes).
Added Bgr565, Bgra4444, Byte4 packed vector classes to all projects.
Corrected case for DxtBitmapContent, PvrtcBitmapContent.
DxtBitmapContent now matches XNA and C# naming conventions.
PvrtcBitmapContent follows suit.
Second part of rename.
Fix missing abstract keyword.
Fix reference to renamed PvrtcBitmapContent class.
Fixed a bug in the MediaQueue where the active song did not default to -1.
This would cause existing games to think that a song was available already
when it wasn't. The XNA default is -1.
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Null checks for _mediaElement in handlers.
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge pull request #2 from dancrevier/wp8_mediaplayerresume

Null checks for _mediaElement in handlers.
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Merge branch 'develop' of https://github.com/mono/MonoGame into develop
Move device creation back to before ApplyChanges is called.  Along with the PreparingDeviceSettings as well.
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Merge pull request #1751 from kjpou1/develop

Develop - Fix for Issue #1750 - Move device creation back to before ApplyChanges is called.
Moved the 'WINDOWS || WINRT' endif that was preventing the graphics device from being created.