Blender Git Loki

Cleanup: rename readfile API functions

- blo_bhead_first (was blo_firstbhead)
- blo_bhead_next (was blo_nextbhead)
- blo_bhead_prev (was blo_prevbhead)
- blo_bhead_id_name (was bhead_id_name)
- blo_filedata_free (was blo_freefiledata)
- blo_filedata_from_file (was blo_openblenderfile)
- blo_filedata_from_memory (was blo_openblendermemory)
- blo_filedata_from_memfile (was blo_openblendermemory)

Missed last commit

Cleanup: comments, use bool for 'eof' variable

Also remove unused members headerdone, inbuffer & filedes,
use typed enum for file data flags.

Transform: redo resize now constrains axis values

Before 1bfbfa281046b this wasn't essential because the constraints
prevented the axes from being applied.

Now redo ignores constraints - the input values must be constrained.

makesrna: Remove usage of dynamically linked pthreads4w

With pthreads now being static, there is no more reason to copy the dll.

Windows: Use static pthreads library.

Windows: Use static pthreads library.

UI: enum property menus now expand down, consistent with other menus.

Differential Revision: https://developer.blender.org/D4359

Merge branch 'blender2.7'

UI: better widget drawing with thick line width.

When the line width was larger than the UI scale, there was not enough
space for thicker widget outlines to draw properly. Now widgets are made
a little larger to accommodate the thicker outlines.

Differential Revision: https://developer.blender.org/D4368

UI: improve corner splitting feedback by showing custom cursors.

* Two cursors for horizontal and vertical split.
* Four cursors for each join direction.
* One cursor to indicate when splitting is not possible.

Differential Revision: https://developer.blender.org/D4264

UI: increase corner splitting hit area to include screen edges.

Differential Revision: https://developer.blender.org/D4242

makesrna: Fix windows build.

makesrna requires the pthread dll to be available before it can run.

Fix T60646: From instancer texture coordinate doesn't work in viewport

Made it so that generated coordinate is always calculated.

Ideally, it will only be done depending on a current shading,
but code is quite deep, and doing smarter thing here will end
up in way bigger refactor.

First, make things working, and then make them fast if they
pop up in a profiles.

Merge branch 'master' into functions

new Driver Variable type that evaluates a function

vector socket actually works now

add function relations

Fix T61810: Cycles OpenCL denoising broken after recent changes.

Cycles OpenCL: Motion Blur Compile Directives

When using preview rendering through a camera or final rendering
the `scene.render.use_motion_blur` was not respected when building
the compile directives.

This patch will when building the compile directives check if
motion blur is enabled at all. This should lead to more efficient
kernels when no motion blur is needed.

Tags: #cycles

Differential Revision: https://developer.blender.org/D4387