Upgrade jQuery and jQuery UI

Does not work, so [skip ci]
Upgrade to Fullcalendar 2.2.2

Still not functional, sorry [skip ci]
Use a new timepicker

This one just works! It's a wonderful timepicker by Jon Thornton
(https://github.com/jonthornton/jquery-timepicker).
Fix several time formats
Fix warning about moment().add()

The order of the parameters changed on recent releases, so moment was
showing a warning
Fix date selector on top

Was broken because datepicker now doesn't work on a hidden field.
Fix cell clicking/selecting to create new events
Fix select helper on agenda views

Now using the select helper shipped with Fullcalendar
Fix error when dealing with events with no reminders

Check in first place if the event has any reminders configured
Fix event resizing and dropping

Fullcalendar seems to have a bug with all day events, so this part
needs some work
Fix event rendering after resizing/dropping it

We don't want to render the whole event because Fullcalendar does it.

Just update its ETag to allow new modifications.
Update qTip2. Fix tooltips on calendar

After the update and minimal modifications, tooltips are working again.
Limit the number of events per cell

Now a large number of events won't make the calendar extra-long, but a
'+X more' will appear at the cell's bottom
Switch to a custom jQuery UI theme

No more orange, please!
Use the right style for the user menu
Update theme. Fix current day highlighting
Fix calendar styling

Removed old border and color definitions. Fullcalendar 2.x has not the same
HTML structure, so the old CSS rules were just making the calendar look strange.
Fix event icons

They are showing again
Merge branch 'feature/fullcalendar2' into develop
Merge branch 'develop' of github.com:adobo/agendav into develop