guardian/frontend — pull request #5301 by stephanfowler (2014-07-30 19:42:41+00:00)
Title: History refactor

* makes history into a singleton
* adds a summary of visited sections and (primary) keywords
* removes repeats from history, and instead:
* moves repeated page to front of list
* adds count of # of visits to it
* updates it's timestamp
* removes sequence.js !

NB. list is now always in most-recent-first order

@phamann @NathanielBennett