added a callback to floodfill
Merge remote-tracking branch 'stephen/floodfillcallback' into upstream-master

Conflicts:
	lib/agentscript.map
	lib/agentscript.min.js
Added a floodFillOnce function
fixed doc typos
Merge branch 'typos' into upstream-master

Conflicts:
	lib/agentscript.map
Merge branch 'flood-test' into upstream-master

Conflicts:
	lib/agentscript.map
Small TileDataSet update; now inits with 0s
minor floodfill update
Updated readme.md
Merge branch 'upstream-master' into upstream-pages