Categorical colors
- Color can also be based on categorical attribute, with a categorical colormap
- A default option 'none' has been added for color, which creates all black (unselected) and green (selected) nodes
- 'community' has been added as an attribute for coloring, filtering and shown on the attribute pane (Possible to create with the latest version of caselawapp, see this commit)
- CSS layout has been modified slightly