fix texture name in Blender 2.79

Keep custom properties when applying modifiers to meshes

resolves #434

Note that node tree can't be created when render engine is Workbench, so
switching to Eevee

Use LINEAR interpolation when sampling anims

Note that tangents are still not managed from gltf file, but at least,
there is no more strange...

Fixed dict access key error when image file extension is not lower case.

For meshes use location, rotation_quaternion and scale to export...

Fix issues with auto smooth and other modifiers

Fix animation sampling making way too many keys

Export custom normals correctly

Move & adjust image format options to be more readable

- Other modifiers were lost before for objects with auto smooth

Fix/animation bug

Feature/jpg export

resolves #405

Note to anyone using this: Recently there have been important fixes
merged to both the `ptvsd` ...

Feature: google draco exporter

fix the ordering of inverse bind matrices

Fix/prune unused code

should fix #232

fixed animation tangent transform

targetNames has now priority if exists

The shape key index is overwritten by the inner loop:

io_scene_gltf2/blender/imp/gltf2_blender_...

Correct handling of objects directly parented to bones, fix #286

check if blender image is empty and skip its export if it is

This is not glTF standard, but this workaround is accepted in a few
tools

Deduplicate accessors.

Meshes with modifiers remain duplicated, but should now at least share accessors.

Doesn't help ...

Deduplicate cameras and animation sampler data