Messaging System

Added a functional messaging system! There is a inbox, outbox, and
system to send messages to fellow users (chosen from a dynamically
generated pick-list)

CHANGES TO DATABASE:

Added table 'messages'
STRUCTURE:

toUser : varChar(30)
fromUser : varChar(30)
message : varChar(1000)
deleted : varChar(3)
sentDeleted : varChar(3)
id : int AUTO_INCREMENT