Update models/Event.php

Adds:

Pauper Krew Only functionality (will be changed to clan only once clans are created)
pre-registration cap for events that cannot go over a certain number of players
current round and active event controls
Toggle to allow players to report match results on their own
adds session controls timer to keep players from being logged out
Active registered player function so that drop menus will only have players who are currently in event for pairing manually
adds pairing system engine


Fixes:

Removes poorly named Steward function names replacing with Event Organizer to make role more clear. 
Host CP authorization access
Numerous code formatting and optimizations
Late players are now added to standings
drop player round recording and action method
bye players are not verified correctly
matches are now verified correctly when added manually