support conversions in all directions between bool, int and float

update inferencing to new type rules

concept of conversion groups in type system

start using a better defined type system

implicit conversions between float and integer lists

Merge branch 'master' into functions

Animation: Refactor storage usage during fcurve modifier evaluation

Previously, when a fcurve modifier used storage,
many heap allocations were done.
This caused major slowdowns as described in T63656.

Furthermore, the storage usage was a special case only
used by the Cycles modifier. This refactor makes
storage usage the "normal" case.
That reduces the overall complexity.

The storage is stack allocated now.

The framerate on the provided test scene went up from ~5 fps to ~16 fps.

Reviewers: angavrilov

Differential Revision: https://developer.blender.org/D4701

Avoid autosave name collisions

When the same .blend file was open in two instances of Blender,
the autosaved files would overwrite each other.

The solution is to put the pid into the filename.

The exact pattern is the result of a discussion with @pablovazquez.

Fix T63673: Wrong api documentation for Quaternion.dot(other)

bring back llvm include dirs