Blender Git Loki

Keyframe Checking (i.e. does given frame have a keyframe) is now implemented in the keyframing api.

Replaced the method used in to check if there's a keyframe on the current frame, when drawing the active object name / frame number info with this new code.
- It should in theory be faster than the previous code, as it doesn't have to build an entire list everytime of all keyframes, and also uses more efficient search method.
- Added some settings to control what sources of animation data are used (per 3d-view). Can be found in the View Properties panel.

This should be stable... release builders should ignore this commit for now (to avoid having differences between release candidates).