Minor changes.
setSkin with no previous skin attaches setup pose attachments.

No more API gotcha, setSlotsToSetupPose is not needed.
License header update.

2 -> 2.1 (clearer how permission is granted, formatting).
Support attachment loader discarding attachment by returning null.
Formatting.
Fixed mesh hull debug rendering.
Throw exception if a mesh can't be rendered.
Fixed debug drawing when non-essential data was not exported.
Change Variable name.
Fixed mixing two animations using different time scales.
Use previous animation's time scale for the mixing duration.
setToSetupPose for meshes.
Organization.
Meshes, FFD and skinning for spine-csharp and spine-xna.

Also updated example projects for spine-unity and spine-tk2d, but no meshes, FFD or skinning for those two yet.
Fixed track entry mix not defaulting to 1.
Apply latest runtime changes to MonoGame (iOS) (Meshes, FFD and skinning).
Apply latest runtime changes to MonoGame (Windows8) (Meshes, FFD and skinning).
Merge pull request #210 from RandolphBurt/monogame-ffd

Updated MonoGame projects to include additional FFD/Mesh/Skinning source files
Merge branch 'master' into monogame