Remove containment

I see why it was commented out in the first place.

The containment does not expand as the grid increases
in height. This prevents you from being able to stick the
item in the bottom row of the grid.

I looked into updating the containment dynamically with no success.
Better to not specify a contaiment for now.
Merge pull request #42 from jdewit/fix/containment

Remove containment
fix column width bug

fixes #9

The resizable max limit was using maxColumns to determine the maximum width
 that an item could be.

I don't see the need for the maxColumns option since you specify the number
of columns you want with the option "columns". That should be your max.
Merge pull request #43 from jdewit/fix/column-width

fix column width bug