Tree breaks if populated with objects lacking a w and h attribute.

[ianisl]

The documentation says that 'every item must have a .x and .y property', otherwise the tree will break. However, I've found the tree gives inconsistent results with objects lacking wand hproperties.

This is an expected behavior since there is no reason one would not specify objects width and height, but I think the readme should mention it.

[Barbosik]

I written my own quad tree implementation, so may be you will be interested: https://github.com/Barbosik/QuadNode