add QNode creation to refine and expand
change object_to_node to id_to_node
add some clearing fns
debug a little
add tests for inserting, start tests for some other basic functionality
more debugging
fix nested this bugs
add jquery
fix expand
add expand tests
add default mode to query
add more thorough coarsen tests
add 'contains' function
add contains tests
add 'contains' to QNode and switch order of insert to use contains
explore large-number weirdness
change remove_* function names
OMG MAKE ROOT NODE AFTER INITIALIZING ALL QUADTREE FIELDS
fix removal
complete tests for removal