Deleted debug lines from xfades.
Deleted redundant xfade value from anim library.
Fixes segfault if no skeleton exists on COLLADA.
math: Fixed == operator from matrices.
Forgot to add this in b4bfa97f3
Test framework, and simple collada load test.
CMake: compile skeletor as library.

Now test code doesn't need new compile of the codebase,
and can only be linked against skeletor.
Added simple KeyFrame unit test.
Bullet ragdoll conversions in progress.