Core/Spells: Do not bypass target checks when handling SPELL_AURA_ADD_TARGET_TRIGGER.

Fixes ie. Chilblains being applied to the DK on login.
Core/Spells: Since patch 4.0.1 Hunter's Mark is limited to a 30 seconds duration in PvP.
Core/Units: Fixed Moonkin forms for Trolls and Worgens, as well as epic Flight forms.

Also (hack?)fixed Glyph of Arctic Wolf.
Core/Spells: Since patch 4.3.0 Vampiric Touch's backlash effect does not have any diminishing return.