* Changed mesh creation code to use universal functions. Also tried to make it more readable & commented it.
* Support recall date (Edit Object Parameters)
* Support height of 0.0 (the cylindric middle part is skipped)
* Support negative cap-height
* Made PEP8 compatible and some cleanups.
* Generell: Updated "createFaces" function to support fan/star like face creation as well.

add export_unreal_psk_psa.py
import_scene_unreal_psk.py
these two scripts are in working order.
there's some known issues, users generally work around them.
"no more or less buggy than current i/o scripts"


[[Split portion of a mixed commit.]]