updated Farseer nuspec with new tag reference

updated Farseer nuspec with new tag reference

updated Farseer nuspec with new tag reference

updated Farseer nuspec with new tag reference

updated Farseer nuspec with new tag reference

Group transform true by default (prime31#390)

It fixed a weird bug i had (padding was ignored in some cases)
And looks like it is set to true by default in libGDX too: https://github.com/libgdx/libgdx/blob/master/gdx/src/com/badlogic/gdx/scenes/scene2d/Group.java#L42

shader compiler

added async loading of scenes for transitions