Initial commit.
Fixed scatterplot obscured in Firefox.
Resolved conflict.
Added toggle entity logic.

* Re-wrote much of the code to fix the trouble with removing an entity
(enter-update-exit paradigm)
* Added buttons in the entity tab to show or hide entities
* Regression - labels will need to be re-implemented
Added simple tooltip hover over username for circles
Included JQuery UI Touch Punch for better touch event handling on mobile devices.

* See http://touchpunch.furf.com for a full explaination.
Included JQuery UI Touch Punch for better touch event handling on mobile devices.

* See http://touchpunch.furf.com for a full explaination.