Use the directive definition object explicitly
Make the timeago directive expand into a standard HTML5 time element
Make JSHint happy
Improve code reading
Merge upstream changes
Improve performance by attaching watchers only when they are needed
Fulfill test: module angularMoment am-time-ago directive should not change the contents of the element until a date is given
amFormat should be a string binding
Merge remote-tracking branch 'upstream/master' into gsklee/time
Use a more lightweight approach to attach the datetime attribute whenever it's a time element
Merge branch 'gsklee/time' of https://github.com/gsklee/angular-moment