Design layout for home page

[b]

This needs some thought. One thought is to evoke something like a very birds eye view of the graph as a whole on the page. e.g. how Reactome does it:

Ideally this could be generated directly from the database somehow.. But a custom artistic take is probably the right way to start.

[Richard Bruskiewich]

A baseline implementation of a new home page with concept map graph awaits feedback from Ben. Possible enhancements would be a formal 'About this Map' link to a page describing how the home page graphic was generated.