Angular moment timepicker

A rewrite of a [rewrite of `js/ui/timepicker`.](https://github.com/sportngin/sport-ng/pull/27)

QA on venue admin can be found [here](https://github.com/sportngin/venue_admin/pull/116)

In using Moment instead of the [previous angular timepicker](https://github.com/sportngin/sport-ng/pull/27), two functions were compromised:

1. *overflow:* `1:62pm` will be invalid, instead of being parsed as `2:02pm`
2. *weird case:* Moment will not parse `hmma`, for some odd reason. So if you'd like to enter `3:00pm` into the timepicker, you _must_ include the colon, or it will be deemed as invalid.
What benefits do we get by stripping characters?

Is this related to how the old time picker would clear out "invalid" times?