[0835] Added missing GO 175966 in Stratholme

* Added missing GO 175966 (Enchanted Scarlet Thread) in Stratholme
Also put them into a pool
Source: YTDB
[0836] Fixed some Alliance graveyards in Horde territories

* Fixed graveyard for Alliance in Ratchet. Thanks Metalica for
pointing. This closes #624
* Alliance players dying in Mulgore and Thunder Bluff are now ported to
Bloodhoof Village graveyard as they should instead of Ratchet
Source: http://www.wowwiki.com/Mulgore#Patch_changes
[0837] Fixed respawntime of GO 177287 in Stratholme

* Fixed respawntime of GO 177287 (Unfinished Painting)
Thanks TheTrueAnimal for reporting. This closes #676
Source: https://www.youtube.com/watch?v=2Dm3YwxxJUo

Signed-off-by: Cala <calaftp@free.fr>
[0838] Fixed drop chance of item 5339 in Wailing Caverns

* Fixed drop chance of item 5339 (Serpent Bloom) in Wailing Caverns.
Though a quest objective, it should be lootable by everyone and should
have a 100% drop chance.
Thanks TheTrueAnimal for reporting, Sinoxan for researching. This
closes #674