Pydoc: Fix multiple bpy.type modules

Pydocs: Expand bge.contraint docs

Takes information from the manual and dumps it here.

PyDoc: Merge manual docs for bge.texture

https://docs.blender.org/manual/en/dev/game_engine/python_api/videotexture.html

Had a few things that this file did not while this file having things the other did not.
To fix, I merged both documents into the python api.

Fix T54360: FFMPEG bitrate not editable for all codecs

The bitrate selection was hidden when a CRF mode was chosen and then
switched to a codec that doesn't support CRF.

Fix compilation error

Recent fix was assuming some cleanup is done.

Update addons submodule hash

Fix T54234, add BLENDER_VERSION_CHAR to .plist

Fixed: cache clearing when using multiple Alembic files.

Cleanup: Use more python way of checking boolean

Tracking: Make object created form tracks active and selected

Tracking: Warn when no tracks are selected when creating mesh

Makes it more clear why mesh was not created this way.

Fixes T54368: 3D markers to mesh In MovieClipEditor Not working.

Fix T54348: Bone dissolve gives invalid hierarchy

Disconnected bones weren't handled correctly.

Fix bone dissolve using wrong envelope radius

Also correctly copy bone tip selection when dissolving.

Fix T53478, T53430: Sequencer cut edge case fails

Previous fix for T53430 caused T54200.

The edge case for soft & hard cuts weren't working,
where the strip used start/end-still & the frame was placed exactly on
the start/end of of the sequence content.

T54200 fixed the end-still case but broke hard-cuts for all other cases.

This fixes the case for soft/hard cuts with/without start/end-still.

Revert "Fix T53430: Cut at the strip end fails w/ endstill"

This reverts commit 855799ecc1c5e53d9fbfe520fd5402bc0138f674.

Caused T54200

Error passing context arg to marker menu

own mistake in 6981861fcfd

API generating script: give better version for releases builds.

Was giving '2.62.1 <sha1>' even for releases, now rather giving nicer
'2.62a <sha1>' in that case.

Fix T54206: bevel and inset operations repeat did not remember offset.

Now repeating the operator will use the previously chosen offset, either with
the modal operator or typed in. The modal operator will still start at zero.

Fix T54204: Wrong selection on Clean Tracks (Motion Tracking)

A mistake in a fix for T53612.

Regression in 2.79a, candidate for 2.79b :S

Fix T54003: Particles - Size and random size not present in "physics" tab in Advanced mode

The check to see if `use_advanced_hair` was enabled was actually in two places
(render panel `draw` function and physics panel `poll` function). As these
properties are only in one place now the check in `draw` isn't needed anymore.

Related: T53513, a6c69ca57f661a8538