tpa functions & and bitmap fix + rename.

tpa:
- added SortATPAFromFirstPointX
- added SortATPAFromFirstPointY
- added MedianTPA,
- added MedianTPAEx
- added FilterTPAsBetween

bitmaps
- fixed CreateTPA and renamed to FindColors (way more suitable name)
- exported FindColors to ps - was previously only in lape(mufasabitmap type + function "FindColorsBitmap")

All tested in ps & lape(from my end), hate, delete, say anything you want. But i see a good use in every single func/proc :)