Blender Git Loki

2.5 - More work on getting file read/write support for Animato running

* Reorganised all animation-related file-writing code to be in the same area in the code, and clearly marked which parts of code are only used to ensure we can load old files to version-patch.

* Added file reading code for new datatypes, so it is possible to load the quit.blend file saved from the previous session. Version patching to work with the new system has yet to be done...

* Assorted whitespace fixes in places I skimmed through...