*Fix usage of EffectValueMultiplier in spell code.

*Remove some obsolete code from spell class.
*Rename some spellmod and dbc column names to be more accurate.

--HG--
branch : trunk

src/server/game/Spells/SpellMgr.cpp

@@ -1896,6 +1896,26 @@ int32 SpellMgr::CalculateSpellEffectBaseAmount(int32 value, SpellEntry const * s
         return value - 1;
 }
 
+float SpellMgr::CalculateSpellEffectValueMultiplier(SpellEntry const * spellEntry, uint8 effIndex, Unit * caster, Spell const * spell)
+{
+    float multiplier = spellEntry->EffectValueMultiplier[effIndex];
+
+    if (caster)
+        if (Player * modOwner = caster->GetSpellModOwner())
+            modOwner->ApplySpellMod(spellEntry->Id, SPELLMOD_VALUE_MULTIPLIER, multiplier);
+    return multiplier;
+}
+
+float SpellMgr::CalculateSpellEffectDamageMultiplier(SpellEntry const * spellEntry, uint8 effIndex, Unit * caster, Spell const * spell)
+{
+    float multiplier = spellEntry->EffectDamageMultiplier[effIndex];
+
+    if (caster)
+        if (Player * modOwner = caster->GetSpellModOwner())
+            modOwner->ApplySpellMod(spellEntry->Id, SPELLMOD_DAMAGE_MULTIPLIER, multiplier);
+    return multiplier;
+}
+
 SpellEntry const* SpellMgr::SelectAuraRankForPlayerLevel(SpellEntry const* spellInfo, uint32 playerLevel) const
 {
     // ignore passive spells