Bugfixes:

• Fix failed camera search when canyon/cliff/cave loaded as nature background
• Fix scrambled GT maps in blender_gt due to incorrect OpenEXR pixel unpack ordering #373
• Fix save_mesh kwarg mismatch from v1.10.0
• Remove frozendict dependency
• Make geomdl optional if not using creatures
• Make submitit optional if not using SLURM
• Make blender addons optional if not using relevant assets (rocks/terrain/snowlayer)
• Make bnurbs CPython module optional and not installed by default