[2008_10_31_01_mangos_creature_template.sql] Creature related code and DB cleanups.

* Rename 2 creature_template fields to more clean names and related code update also.
* Use enum values instead raw values for type_flags, use halper functions instead code repeating.
* Move tamed pet creating code to new function.

src/game/SharedDefines.h

@@ -1531,6 +1531,13 @@ enum CreatureFamily
     CREATURE_FAMILY_SEA_LION       = 36
 };
 
+enum CreatureTypeFlags
+{
+    CREATURE_TYPEFLAGS_TAMEBLE    = 0x0001,
+    CREATURE_TYPEFLAGS_HERBLOOT   = 0x0100,
+    CREATURE_TYPEFLAGS_MININGLOOT = 0x0200,
+};
+
 enum CreatureEliteType
 {
     CREATURE_ELITE_NORMAL          = 0,