DB/Misc: Traveler's Tundra Mammoth

Script vendors on Traveler's Tundra Mammoth so that when player dismounts they say there line before despawning

Scripts: -
* Hakmud of Argus <Traveling Trader>  - http://www.wowhead.com/npc=32638
* Gnimo <Adventurous Tinker> - http://www.wowhead.com/npc=32638
* Drix Blackwrench <The Fixer> - http://www.wowhead.com/npc=32641
* Mojodishu <Traveling Trader>- http://www.wowhead.com/npc=32642

Only the first texts by each of the horde vendors is from sniff, rest taken from wowhead

Closes https://github.com/TrinityCore/TrinityCore/issues/11349
Fix type on delete clause
DB/Misc: Cosmetic Fixes

* Have you ever seen one of these?
* Some additional texts for Perry Gatner
DB/Misc: Kill warnings

From negative spawntime in creature
DB/Misc: More Perry Gatner Texts
Rooted vehicle movement (#13342 for example)

Corrects issue where certain combinations of actions would cause vehicles (usually cannons/artillary) that should be rooted, to be fully movable

Update 30/11/14:
 - Changed to only check live flags