Blender Git Loki

Keying Sets - PyAPI consistency issues:
* Added 'id_name' property, which is used as the "typeinfo_name" by Keying Set instances. This is simply the name of the relevant KeyingSetInfo classes.

* Renamed the 'array_index' arg for ks.add_path() to 'index'. Also removed the 'entire array' toggle arg in favour of just passing -1 to index. However, Keying Sets in general still maintain their 'entire array' toggle flags for now, it's just that the API function does conversion between the two.