* fundamental rewrite of a lot of aspects of the exporter, for cleaner code & to solve a number of issues
* set export_separate_dynamic_and_static_objects default to FALSE, as it is an edge use case
* added central tracker class, to track the post save & depsgraph changes
* auto_export is now more operator centric, with functional undo
* now storing add-on configuration at the blend file level (bpy.data.texts)
* found source of export issues ! mismatch between context.scene & context.window.scene (the last we can set, the other not)
* overhauled & cleaned up materials handling to avoid context issues & reliance on bpy.ops
* huge restructure of how temporary scenes are created & cleaned up
* added support for exports in edit_mode
* updated examples
* a lot more
* fixes#103
* fixes#112
* fixes#113
* fixes#114
* fixes#115
* fixes#116
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