Merge tag '4.9.4' into develop

Features:
* Added a drop-down menu for file type selection at export time
* Refactored code
[#6] In library_images there are now only images for exported objects.
[#6] Little simplification of __export_library_effects.

Now it uses __get_materials_for_selected_objects routine.
[#6] Variables renamed
Cleaned up extract_anir and extract_anil
Fixed up extract_anir and co. also fixed glitch with CGA and CHR export.
Revert "Fixed up extract_anir and co. also fixed glitch with CGA and CHR export."

This reverts commit 458765d67e96d1964d63160d90bed2407cf1f451.
Working 4.9.8
Fixed index number handling
Fixed .anm export
Updated changelog
Removed commented code, extracted axises
Merge branch 'release/4.9.9'