API
jPine(target, items)
insert(parent, children)
expand(item)
expandAll(item)
collapse(item)
collapseAll(item)
forEach(f,item)
run f(item) for item and for every of item's descendants
- f callback function, return false to stop traversing immediately
- item root item (or the entire tree if not passed)
getStates(item)
setStates(states)
onToggle(item)
onFolderClick
onFolder2Click
onClick
on2Click
onBlur(item)