create PhysNode class to hold physical properties of nodes/edges
move name variable from Edge/Node to PhysNode
initial commit of WordCloud class
move WordCloud stuff to Graph
unregister mouse events on destructor of TextSelectBar
add click events to trigger re-sorting of graph
first stab at graph update function. not tested. at all.
add mouse events to edge
change default xml file name
add random size and fix random position for random mode