Blender Git Loki

Docs: add comment on reloading modules

Use IOError exception failing to write blend file

Fix T47676, take two: also do some 'regular file' versionning (allows to handle users own default startup files, among others...).

Fix T47676: Broken default values for particle brush strength.

Current startup .blend has old (percent?) values for particle brush strength.

Since rBe4e21480d6331903c90ab073746484498441e1ac, UI controls do not clamp automatically values anymore,
which means when you first enable comb (or any other brush) you get a 50 strength, waaaayyyy to powerful.

This commit fixes this in `BLO_update_defaults_startup_blend`, note that it does not fix custom users'
startup files, nothing to do here...

Fix T47644: crash (use-after-free) regression from rB7a74738914a66e.

Handling `me` data here is not good idea anyway, we override it completly with data
from `tmp` (crash came from freeing already existing bb from me, while pointer still existed in tmp).

(rediscovered it while working on T47676...).

To be backported to 2.77.

Fix T47674: "Change Data/Files" setting incorrect filter

Image filter was not set, but only if invoked from toolbar (image strip needs to be selected to see the button).
Caused by rB7fa72b8970, Wasn't aware there's another button for this for image strips.

Fix player (c)

Make texture node threaded

Quite trivial idea -- just pass tread ID to the texture sampling function.

Implemented as a TLS to avoid passing huge amount of extra contexts around.
Should be working on all platforms, but compilation test is required.

Reviewers: juicyfruit, campbellbarton

Reviewed By: campbellbarton

Differential Revision: https://developer.blender.org/D1831

Add utility macro to work with thread local storage

PyAPI: API for selectively writing data-blocks

Useful for writing asset-libraries to a file, eg.

`bpy.data.libraries.write(filepath, datablocks, relative_remap=False, fake_user=False)`

Refactor BKE_copybuffer for general partial saving

Move to re-usable BKE_blendfile_write_partial API

Avoid some obvious crashes when running out memory allocating render result

Render Save Buffers: Use proper memory buffer size for a display buffer

CMake: Remove redundant print of Git Found message

find_package(Git) will already print this.

UI: move checkbox for missing add-ons to LHS

Experimental option to build Blender with C11 support

It'll be nice to eventually go C11/C++11 by default, but for until
then it's kinda handy to be able to build locally with C11 support,

Reviewers: mont29, campbellbarton

Reviewed By: mont29, campbellbarton

Differential Revision: https://developer.blender.org/D1752

Cleanup: take Main argument for copy

Fix RNA property clamp assigning in Python

On first assignment the value was clamped, but successive assignments weren't.

Cleanup: comments for creator_args & line length

Armature edit-mode: Add clear-roll operator, Alt-R