moved core dependencies to tiled subfolder
cleaned, added some text
basic renderer more editor complaint:
- fixed tile rendering at own set size and from cells bottom-left
- added set tileOffset support
- added draw grid / cells feature

some text edits
better grid line drawing
cleaned stuff
chunked renderer update progress
 - layers chunks render tiles at proper size + offset (but no overdraw cutoff fix yet)

tile selector tile size bug fix
tile selector smarter redraw
added some text
less disco
chunked renderer redraws cache sub rect for visible tile area only (ugly calc for now but usefull for sparse tilemaps)
fixed bounce animator for small maps
added event removeAll