Blender Git Loki

Add stubs for API methods for validating and sorting nodes once graph is built

Refining timesource lookup to include the possibility of looking up those for timeoffset

Stub for graph sorting

Add component to ID node

More work fleshing out graph building...

Added "validate_links()" callback to node typeinfo

This callback is used to ensure that all "builtin" operations and/or
relationships between components used to enforce certain valid-evaluation-
order constraints are satisfied. Having some of these in graph building
would be a bit too much of an extra burden to have, when much of these
are pretty much standardised actions that must take place.

Upgraded parenting stuff - still doesn't work quite right yet

Rename helper used to create component nodes to be clearer

WIP work to flesh out how the copying algorithm should work

Move all geometry-related depsgraph building into a separate function

Removed code to initialise components when creating ID Ref

This causes problems when building the graph and we don't initialise the
id ref first, resulting in double-ups. However, initialising ID's first
is kindof painful when dealing with some of the usecases in graph building
that we have

Start of porting effort of graph building code over to the new system

Not everything is done yet, but the parts that are are taking shape
much better under this scheme

Added missing typedefine for pose eval

All component nodes now have "add_to_graph()" callback

This is needed now since they are created directly when building the graph

Adding some missing includes

Add copy-context argument to all copy callbacks

First attempt at copy operation for ID Nodes

TODO: Relationships are still not hooked back up yet

Remove obsolete API

Filtering context init/free

Typeinfo defines for outer nodes