Blender Git Loki

RNA - Finished wrapping Armatures + Bones

Notes:
- I'm not sure whether we want to move out the PoseMode hide flags from here, but PoseChannels directly get most of their flags from here.
- Some of the settings for Bones have not been exposed, as they are mostly internal flags or used only by transform
- I'm not sure whether we should be exposing EditMode settings like head/tail/roll directly here...