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.
I changed the names and the scope, which made everything much simpler. However couldn't get `@` scope to work while testing, even though it probably would be better for all of the variables except `time`. I remember having problems previously with `@` parsing booleans `{{baz}}` as strings rather than booleans. Although this round I could even get the functions passed in correctly.....