Added onNodeHide and onNodeShow events
Improve performance with lazy-loading and by removing underscore.js dependency (still used in tests).
Fix non-expandable and initially expanded trees after performance optimizations. Improve test coverage.
Do not invoke onNode{Hide,Show} callbacks when initializing nodes.
No padding/margins on indenter.
Update TODO list
Add selected row highlight to big.html.
Indentation of table in big.html.
Condense multi-level if statement
Updated jQuery to 1.9.0