Metadata styling demo

Working on per-node styling for display of metadata. This screenshot shows some faux-metadata (actually tree topology data).
Branch width: Square root of number of leaves
Node color: Number of children (red = 2, black = 0 in this case)
Triangle color: node height (i.e. maximum leaf depth.)

The color palettes currently implemented are the three "Color Maps for Categorical Data" from Metadata elements.

(Click for full size)

Similarly, with the NCBI tree in the circular layout. (Branch width here was O(log10(num. leaves)), and node colors are mapped differently.)

A portion of the NCBI tree in the cladogram layout

Now with color maps for continuous data! The 50K node sample tree with the collapsed subtree triangles colored by total number of nodes in the subtree. (Greener = more)