Blender Git Loki

Viewport: add default set of HDRI images.

These are taken from HDRI Haven (https://hdrihaven.com). Many thanks to
Greg Zaal for creating and releasing them under a CC0 license!

The HDRIs are intended to be used in the Lookdev display mode. With
1K resolution and compression they are not intended for final renders,
but it keeps the file size small and the difference is not noticeable
for lighting.

Command used for compression:
oiiotool %s --ch R,G,B -d float --compression dwab:300 -o output/%s

Wrokbench: Add support for maximum drawtype OB_TEXTURE

Fix Cycles AO pass not working for shadow catcher objects.

Bone Display: fix flickering issue with BBones in ortho view

Image Editor: Add active tool button for Annotations (WIP - Event handling not working)
This reuses the tool defines for the 3D view. However, for some reason,
the events don't seem to be getting fired off here, like the tool system
is getting ignored here completely.

FIXME: Resolve the event handling issues

Object Mode: Add back support for the object "Maximum draw type" option

UI: Small adjustments to Smoke properties layout

Overlay: Add support for per object wirefram options

This patch has a known bug on AMD + mesa because of the drivers. I will
send a bug report to mesa.

Merge branch 'master' into blender2.8

Fix: Theme colors for datablock channels were missing for the NLA in the new default theme

Motion Paths UI: "Update from Scene Range" operator

Make it easier to update the frame range for motion paths from
the Scene's current frame range (render or preview range)

Fix BMesh edge_bisect, edge_percent being ignored

Also fix float/int/bool access methods

Cleanup: unused warning

Merge branch 'master' into blender2.8

Cleanup: trailing space

RNA: Spline.calc_length() utility function

D1810 by @Matpi w/ edits

build_environment: fix build issues with alembic

-read all headers from openexr not ilmbase
-add missing iexmath lib
-turn binaries back on, the blender unit tests require them.

Workbench: hide background option for OpenGL render

When OpenGL renderer is selected the option for background colors are
displayed, but ignored. For now we hide this option as it makes no sense
to have a viewport color option without viewport or render a 'final'
with a theme color.

build_environment: windows harvest cleanup.

remove the commands that have already moved to the individual cmake files.

build_environment: opencolorio buildfixes for windows.

copy the debug libs to the right place.