Rexxar Champion of the Horde now patrolling

Rexxar will now patrol from Stonetalon mountains, through Desolace, and
into Feralas.
This requires core build as of 9th of October 2014
Making use of the new event: EVENT_T_REACHED_DESTINATION
Merge pull request #157 from Chuck5ta/Rel20

[DB] Rexxar Champion of the Horde now patrolling