Several changes in map. Check it description!

CHANGES IN KAZORDOON:
• Fixed several house tiles and house exits
• Added houses (Tunnel Gardens 1 and Tunnel Gardens 2)
• Minor fixes

OTHER CHANGES:
• Reviewed White Deer and Donkey spawns. I think that it's looking
better now (More similar to Global)
• The White Deers cannot be found in the north of Thais anymore. Only
near Carlin and Ab'Dendriel
• The Donkeys cannot be found around Thais anymore. All spawns removed.
(Donkeys doesn't spawn anywhere in Tibia, cheers @EPuncker)
• Added NPC Lavirias spawn to Ab'Dendriel, cheers @EPuncker)
• Fixed some missing tiles and borders in Zao
• Added the Frozen Ursagrodon wall to his cave in Svargrond
• Minor fixes
Added Melting Horn and Frozen Ursagrodon (wall)

Preparation to Ursagrodon taming system
Merge pull request #1128 from xWhiteTiger/master

[UPDATED] Several changes in map and items added. Check it in description!