[12198] - Remove weapon skillgains, defense skill, thanks @FailzorD for original patch.

- Update dodge, parry, block to cata.
- Some mastery fixes and stylefixes.
- Remove some no longer used functions.

Signed-off-by: Yaki Khadafi <elsoldollo@gmail.com>

src/game/SpellMgr.cpp

@@ -4750,3 +4750,33 @@ SpellEntry const* GetSpellEntryByDifficulty(uint32 id, Difficulty difficulty, bo
 
     return NULL;
 }
+
+int32 GetMasteryCoefficient(SpellEntry const * spellProto)
+{
+    if (!spellProto || !spellProto->HasAttribute(SPELL_ATTR_EX8_MASTERY))
+        return 0;
+
+    // Find mastery scaling coef
+    int32 coef = 0;
+    for (uint32 j = 0; j < MAX_EFFECT_INDEX; ++j)
+    {
+        SpellEffectEntry const * effectEntry = spellProto->GetSpellEffect(SpellEffectIndex(j));
+        if (!effectEntry)
+            continue;
+
+        // mastery scaling coef is stored in dummy aura, except 77215 (Potent Afflictions, zero effect)
+        // and 76808 (Executioner, not stored at all)
+        int32 bp = effectEntry->CalculateSimpleValue();
+        if (spellProto->Id == 76808)
+            bp = 250;
+
+        if (!bp)
+            continue;
+
+        coef = bp;
+        break;
+    }
+
+    return coef;
+}
+