Added tests for addNodeAfter, addNodeBefore and addParentNode
Added tests for addNodeAfter, addNodeBefore and addParentNode

mbraak/jqTree,hbaptiste/jqTree,bolster/jqTree,hbaptiste/jqTree,mbraak/jqTree,bolster/jqTree,mbraak/jqTree,bolster/jqTree,hbaptiste/jqTree