Animated height change when parse tree loads, and some other updates to the demo.
Fixed zoom and pan functionality for multiple trees per page!. Also the legend is back, and just as buggy as it was before.
Made the colors better, made the root node the same size as the other nodes, made nodes fill in automatically for nodes, unless you are working on creating a tree. Also fixed the overlapping label issue, so tree separation is determined either by the length of the node's value, or the length of its label, whichever is longer.