Now, find the scene most 'used' by exported group elements, and use its unit settings!

FBX export: fix a strange bug where 'return a_list and a_bool' could return a_list instead of a bool?!

Now also check modifiers stack.

PitchiPoy Animation Productions is sharing its custom rig types
with the Blender community at large.  The new rig types all start
with "pitchipoy." and are used in PitchiPoy's productions.

Of particular interest is a face rig type for auto-rigging faces.
Other rig types include:
- Tentacles
- Fingers
- Arms/Legs
- Spine/Torso

Many thanks to PitchiPoy for their hard work and for sharing this back!

When we are exporting actions or strips from NLA, and an evaluated anim leads to no anim
at all (like single-keyed actions or pure static ones), key all start and end frames.

Note this might be overkill (due to baked anim, we will key *all* transform channels),
but probably better than skipping completely those actions!

Forward/Up axes to FBX system was still wrong. Not happy with finding such issue
at this stage of development. :/ Hopefully now we are OK (at least, checked
all orientations with same basice file in Unity, all were imported OK).

Blender's layers start from 1, not 0.

New compositing node added to switch node type and other classes.

No need to keep it here, this won't be developed further, and remains available
in 'stable' version of the addon.

In "Link to Output Node" and in "Emission Viewer" when all output
sockets are hidden - an error occurred. Now it's fixed.

1. In "Link to Output Node" and in "Emission Viewer" changed behavior
when sockets are hidden.
Even when sockets were hidden - links were made from those sockets. Now
it's corrected.
2. Restricted add-on to work only in Cycles Shaders and in compositing.
Addon is not active for Blender Render material nodes and for texture
nodes.

Not sure at all it will work actually, spent another couple of hours trying to make my UE4
work on VBox, with no luck so far. :/

So, blind guess.

Revision: D739

Patch by jrestemeier (Jens Restemeier).

Revision: D735

Patch by jrestemeier (Jens Restemeier).

FBX Importer: Allow changes to bone orientation during import, allow ignoring "end" bones added by some modellers.

Revision: D732

Patch by jrestemeier (Jens Restemeier).

For now, mere copy of 'main' addon...

We now this has to be rework completely anyway, but until then, better to avoid crash!

matrices, so better to use inverted_safe() in those cases.

Just forbid null scale value...

An anim curvenode may be linked to root node it seems? Pffff...

- "Indication must be 'sperical' or 'planar'" error message if pyproj module is not available.
- GeoReference options (lat/lon) was disabled without pyproj

Ctrl+Shift clicking volume shaders now connects them properly to the volume output

Failed when importing an image sequence where the start frame was something other than 1.

Actually issue was in pc2 exporter, which was not handling subframes correctly.

Fix T41500: mesh_f2.py annoying exception when running blender from terminal with '--background --python'

keyconfigs are not available in background mode...