Organizer's create event page should omit end date to clarify that it's a one day event

[Shuzy]

As an organizer, I want to set start date, start time and end time so that I know the event I create is a one-time thing. Now it is confusing because I have the option to pick a different end date.

[zarrellab]

Made simple change for the calendar pop up to only show time to user. I think this brings up 3 more points:

1. Validation of input
2. Display of events on the events page: If user creates an event from 11am-2pm it shows 11:00-2:00pm, which may not be clear
3. How to handle multiday events, which may be a feature beyond MVP and the user will just have to input 1 event day at a time for now