Cleanup
Get rid of jQuery UI, use d3 and CSS instead

Too heavy to load just for tooltips. BONUS - I also solved the flicker
bug! Just add this css: pointer-events: none;
Add tooltips to the editor buttons
Use `display:none` instead of `visibility:hidden`

We don't want to save space for the things that are hidden
Create container div for html
Get rid of jQuery

Don't need it now that we got rid of jQuery UI - use d3 selectors when
necessary.
Create button to clear fixed positions

Only visible in edit mode
Add person/job titles
Add link popups if available

-Need to add some sort of indicator that a link has notes
-Not sure this is the most efficient way to do this - most links do not
have "notes" to display.
Only listen for mouseover on links with notes
Create function for placing tooltip to reduce redundant code
Ignore all .json files