added item toolbox

get from item box if below board
added get area method

allows you to put object back in itembox (not Daniel mode)
rename area to grid, changed board boundary

	board height is not the bottom of the board
	changed board boundary to 'any y above itembox'
		- may eventually need to determine if between points
determine if in grid in the gridContainer
Supports loading multiple objects (image names go in 'objects.dat')
Merge branch 'gridspace' of github.com:johkelly/LightGame into gridspace
fixed the random nil error

Occured when clicking both mouse buttons while dragging
removed object from old location without placing in new location
Dropping an object on top of another now returns the existing object to the inventory
working on stack
imlpemented stack and initialized cells

methods:
	push
	pop
	top
	objAt
	size
use metatables for stack and show stack size
Merge branch 'stack' into gridspace
commented out same cell drop prevention logic
cleanup
Merge main.lua. Take stack branch changes.
Revamp light collision/reaction to let object define their own operations.