Blender Git Loki

deplibs: let cmake do normal install on webp

build_environment: python 3.7.0 + numpy 1.15.0

Outliner: use generic WM drag and drop system for collections.

* Drag and drop between multiple outliners now works.
* Dragging the icon and text now give the same results.
* Fixes various crashes.

WM: internal changes to support dragging multiple IDs.

To be used by the outliner.

WM: pass on wmDrag to drop operators, so they can get the data directly.

Currently drop operators work mostly by specifying the name of the datablock.
However there can be datablocks with the same name in different libraries, so
this gives wrong results in some cases.

Currently only outliner drop operators have been updated to use this mechanism.

WM: drag and drop poll functions can now specify a custom tooltip.

Cleanup: decouple outliner tree element icon retrieving from drawing.

Cleanup: move most outliner drag & drop code into one file.

update image libraries, D3005 with few mods

Cycles: Removed energy term in SAOH denominator

This should not affect the result since it is just a
scale factor to all terms in the minimization. This
term was not in eq. 2 of the paper.

Cycles: Added more comments and renamed variables

More code comments have been added to all code related to
the light tree. I also renamed all uses of "light BVH" to
use light tree instead to keep everything consistent.
Functions and variable names that used the camel case
naming convention has been changed to follow Blender's
code style. Also, unneeded includes were removed.

build_environment: remove unneeded boost patch on windows.

Submodule commit generated by git tool

This commit des not change nothing only is required by visual studio git tool

Cleanup: Remove unused param

GPUMaterial: Fix color ramp node with constant interpolation

Color ramp with constant interpolation must bypass texture filtering and
use nearest neighboor sampling in order to appear correctly sharp.

This patch use a GLSL hack to use nearest sampling on thoses particular
color band.

Eevee: Fix assert with object volume rendering

GPUMaterial: Group all colorband texture together

This lower the use of texture samplers slots and let users use more real
textures in their shaders.

This patch also make the ramp texture 16 bit floating point. Meaning you
can now use value greater than one in your color ramps.

With the limit of 128 colorband per shader (a color band being either a
color ramp, a wavelength node or a curve node (and maybe wavelength node in
the future)).

Only drawback with the current implementation is that it does not remove
colorband from pruned GPUNodes but it shouldn't really matter in practice.

This should fix T56010

UI: Fix nodelink not touching inputs when noodle_curving is 0

GP: Set instance maximum value to something more logic

build_environment: update freetype to 2.9.1