Modified LTI for Ares eReserves connection

Beginning on line #235 and continuing through #248
+ ////////////////////////////////////////////
+ // 2/12/13 - MIKE SEILER x5237
+ // Modified to use the "sourced_id" from the
+ // Banner LMB enrollment, which in our
+ // instance gets put into 'idnumber' in the
+ // database; use this instead of $USER->id.
+ // Also added 'username'
+ ////////////////////////////////////////////