Added CREDITS
Merge branch 'dev'

Solved conflicts:
	CREDITS.md
Updated README
Changes to test (no incompl. Keil impl.)
Merge branch 'origin/master'
- Fully working Snoeyink-Keil min decomp
 - Cleaned up test code
 - Added complex.png to test images (makes Bayazit fail)
Fixing Bayazit indices
PolyTools: adding isConvex(), isSimple(), findDuplicatePoints(), segmentIntersect()