Blender Git Loki

Py API doc generation: remove reference to "Blender/Python Add-on Tutorial"

That one has been moved to wiki!

Eevee: Fix double promotion.

Buildbot: Switch to GCC-7 for Linux build slaves

This is GCC version was used for Testbuild1 and Testbuild2.

Fix blenderplayer

Manipulator: allow ID-writing for most callbacks

Manipulator: split alpha out of color property

Gives more convenient access from Python: `mathutils.Color`

Also correct some copy-paste error w/ property subtypes.

Fix crash re-registering the same manipulator type

Wasn't unlinking from the group instance.

Manipulator: add snap flag

PyDoc: minor change to recent workaround

- Isolate workaround in single string and link to issue.
- Quiet unused file warning (since it's an include).

Merge branch 'master' into blender2.8

PyAPI: don't use deprecated PyModule_GetFilename

Allows compiling with newer Python versions.
Also add missing decref when compiling as a py-module.

Manipulator: allow py manipulators w/o properties

These could be used for manipulators that run operators.

BPY API: Fix broken ref link

BPY API: Fix usless links leading to compile errors

See https://github.com/sphinx-doc/sphinx/issues/3866 for more information

Fix T52058: Jumping to keyframe causes Blender to freeze indefinitely

Revise the logic here to be more robust when keyframes with
similar-but-different frame numbers (e.g. 70.000000 vs 70.000008)
would cause the search to go into an infinite loop, as the same
keyframe was repeatedly found (and skipped).

Fix T52034: cell noise renders different.

Tweak the bias from the previous fix a bit to be more backwards compatible in
some scene. In the end which way we round is quite arbitrary, but keeping the
case where the texture coordinate is exactly zero the same seems better.

Fix T52066: Grid Mesh UV's aren't correct

Merge branch 'master' into blender2.8

Snap System: Fixed index of objects used to make `snap to volume`

*note: make a complete test scene

Merge branch 'master' into blender2.8

# Conflicts:
# source/blender/editors/transform/transform_snap_object.c