[12333] Add some taxi flying spell cast exceptions

This will fix quests 10525 and 11142
[12334] Send changed fields even if they were changed back

Original code by Shauren, and ideas by stfx and others

Signed-off-by: Schmoozerd <schmoozerd@cmangos>

Conflicts:
	src/game/Object.cpp
	src/game/Object.h