Blender Git Loki

Automatic DPI for all platforms, per monitor DPI for Windows.

For Windows 8.1 and X11 (Linux, BSD) now use the DPI specified by the operating
system, which previously only worked on macOS. For Windows this is handled per
monitor, for X11 this is based on Xft.dpi or xrandr --dpi. This should result
in appropriate font and button sizes by default in most cases.

The UI has been simplified to a single UI Scale factor relative to the automatic
DPI, instead of two DPI and Virtual Pixel Size settings. There is forward and
backwards compatibility for existing user preferences.

Reviewed By: brecht, LazyDodo

Differential Revision: https://developer.blender.org/D2539

Remove support for py app-templates

Only zip-files make sense here.

Merge branch 'master' into blender2.8

Quiet warnings

Merge branch 'master' into blender2.8

Cleanup: imports, indentation, long lines

Fix unreported: inaccuracy of interpolation of custom color layers due to float truncation

Same solution from rBd23459f51640 but now in `layerInterp_mcol`
Also a cleaning was done in the includes

WM: Application Templates

This adds the ability to switch between different application-configurations
without interfering with Blender's normal operation.

This commit doesn't include any templates,
so its mostly to allow collaboration for the Blender 101 project
and other custom configurations.

Application templates can be installed & selected from the file menu.

Other details:

- The `bl_app_template_utils` module handles template activation
(similar to `addon_utils`).
- The `bl_app_override` module is a general module
to assist scripts overriding parts of Blender in reversible way.

See docs:
https://docs.blender.org/manual/en/dev/advanced/app_templates.html

See patch: D2565

Fix various i18n ambiguous issues reported in T43295.

Fix UI message issue, and style cleanup (!)

Cycles: Remove obsolete variable from the TileManager

??? T50995: Wrong freestyle render with new depgraph

The iossue was caused by 0371ef1/

Cycles: Correct isfinite check used in integrator

Use fast-math friendly version of this function.

We should probably avoid unsafe fast math, but this is to be done with
real care with all the benchmarks properly done.

For now comitting much safer fix.

Fix/workaround T51007: Material viewport mode crash on node with more than 64 outputs

Ideally we need to find a way to remove such a static limit here, but it's not so
trivial to implement for texture nodes. Requires some bigger system redesign there.

Just raising limit for now, which is fine for modern systems.

Fix T50238: Cycles: difference in texture position between OpenGL and Cycles render

Buildbot: Use proper NVCC path

In fact, we could probably remove this option all together.

Cycles: Workaround incorrect SSS with CUDA toolkit 8.0.61

Update CLERW to the latest version

Fix for last fix of fix: (unsigned)char is limited to 255

setting char as value outside its range will wrap

Fix of last commit. Clamp values that will be used!