Blender Git Commit Log

Depsgraph: Move builders to own sub-folder

Also split builder declaration file.

The idea is to split files into smaller ones, optionally moving
heavy and tricky builder parts into own files, for example we can
add deg_builder_relations_rig.cc, deg_builder_relations_proxy.cc
and so on.

Also started moving depsgraph into DEG namespace. With all the
complexity over code being added to blender now it should make it
easier to avoid name conflicts and such.