Fonts and Image Max-width

Adding Fira and Clear
Merge branch 'master' of https://github.com/clarkbw/about-history

Conflicts:
	data/css/history.css
removing the test.html page and the other files it brought in.  added a hook to history.html to pull in the test.js file when loaded from the file: protocol
Fixed circles and lines

Also aligned header text, search bar, date button, and spacing for
future clear button.
enable the toggle state again
use the backbone model for creating the twitter urls
Alignment fixes

Fixed some colours, states, button alignments, positioned absolute the
expand button.
Piping the open tab stuff through the tabs module is unnecessary
Using a human readable id about-history@jetpack
Delete related event is setup, need to delete more during this event though.
Also listening to history removes and live updating all about:history pages