[0470] Added waypoints to creature 15509 in Temple of Ahn'Qiraj

* Added patrol movement to creature 15509 (Princess Huhuran) in Temple
of Ahn'Qiraj. This closes #165
Source: http://www.youtube.com/watch?v=qVIsccuTj1w
[0471] Fixed position of creatures 15378, 15379 & 15380 in Temple of Ahn'Qiraj

* Updated position of creature 15378 (Merithra of Dream), 15379
(Caelestrasz) and 15380 (Arygos) in Temple of Ahn'Qiraj to place them in
the middle of the 3 gameobjects after C'Thun encounter
This closes #167
[0472] Removed items from reference_loot_template moved to creature_loot_template

Signed-off-by: cala <calaftp@free.fr>