history: Move history from top-level button to more subtle link

The feature doesn't seem like something that needs to be up-front
and center.  This is still sufficiently accessible and shows up in
a more subtle fashion.

History of course needs some work.
history: reformat to 2-space indentation formatting
history: reformat to 2-space indentation formatting
history: properly order revisions and use moment for displaying rev dates
history: properly set session title when going to history route
history: add initial (somewhat broken) support for showing entry revisions

Things that I know exist right now:
1) No security, use of "context" for user login
2) Going directly to URL without Session context results in a stack
   trace.  Probably some BS with the collection not being at the client
   yet.
Merge remote-tracking branch 'origin/dev' into dev
Merge branch 'history' into dev

Conflicts:
	client/views/entry/entry.html