html(EventBrowse) Small improvements to interface

 - Removed the outside border from the calendar table
 - Added nice spacing to the rows/cols for month and year calendar modes
 - Made the 'Prev XXX' and 'Next XXX' buttons change text according to mode
feat(EventView) Hide RSVPs and show attendance after first swipe

This commit also adds a notification to the event page that thanks the user
for attending the event, and confirms that their attendance was successfully
logged.