Core/Spells: Cleanup in Spell.h:

- Codestyle (fix function naming) and cleanup changes in SpellCastTargets class, also access variables of this class by getters/setters
 - Move IsQuestTameSpell function to SpellMgr.h
 - Move UnitList typedef to Unit.h
Additionally - add missing copyright notice to SpellAuraEffects.h

src/server/game/Spells/SpellScript.h

@@ -261,7 +261,9 @@ class SpellScript : public _SpellScript
         // accessors to the "focus" targets of the spell
         // note: do not confuse these with spell hit targets
         // returns: WorldLocation which was selected as a spell destination or NULL
-        WorldLocation* GetTargetDest();
+        WorldLocation const* GetTargetDest();
+
+        void SetTargetDest(WorldLocation& loc);
 
         // returns: Unit which was selected as a spell target or NULL
         Unit* GetTargetUnit();