Campbell Barton
9e09214979
This adds support for creating a `BlendFile` (internally called `Main`), which is limited to a context. Temporary data can now be created which can then use `.libraries.load()` the same as with `bpy.data`. To prevent errors caused by mixing the temporary ID's with data in `bpy.data` they are tagged as temporary so they can't be assigned to properties, however they can be passed as arguments to functions. Reviewed By: mont29, sybren Ref D10612