Left Menu Gets Events

Left Menu now correctly pulls events from the database and uses those
to generate cells for its table. Also, EventChatViewController now
distinguishes between chosen events. This required modifying
SlideNavigationController and setting it so that view controllers could
navigate over view controllers of the same type which is disabled by
default.
Implementation of Event Chat

First go of Event Chat is implemented
Updating occurs only when user initially loads or sends messages
Users own messages are now differentiated from messages of other uses
when determining the color of chat bubble
Addition of Friend Class

The rest was worthless