Angular timepicker

A rewrite of `js/ui/timepicker`.
Currently has all the functions of old timepicker, but we may want to drop/revise some. Cannot currently replace old timepicker, due to the non-angular nature of many sport admin pages that utilize timepicker.

QA on venue admin can be found [here](https://github.com/sportngin/venue_admin/pull/116)

~~In order to simulate blur events for tests, I needed to add jquery. I don't think there's a better way to simulate blur events, but there may be a better way to import jquery. I could also bypass the blur events and just test the function itself, if necessary/recommended.~~
Instead of simulating blur events, I just triggered them manually using the function called by ng-blur, because I didn't know if adding jquery was really a thing we wanted to do. Tell me and I can change it back.
There is some case mixing going on here, is that intentional? (`displayformat`, `displayFormat`, etc)

I don't think `scope.displayFormat` will be set if it isn't passed in, so using `_.extend()` should work.  (Assuming the casing is unified.):
```
var opts = _.extend({}, _.pick(scope, 'displayFormat', 'stringToTime'), defaults)
```