Fixed issue when someone wins multiple bets.

Array keys must be unique so instances where someone won more than
one bet per match would overwrite the last key with their name, 
resulting in them being paid only one time.

results array changed to a multidimensional array:
$results[] = array( winner => $winners, betvalue => $betvalues)
Started adminpanel.php
Added function to check if user exists
Updated adminpanel to change any users' points
Merge pull request #7 from JoeStaines/master

Started with admin features