Implements clearbody, update changestatboost interface

Scripts/Interfaces/Pokemon.astypedef

@@ -30,7 +30,7 @@ type Pokemon {
     void Damage(uint type, DamageSource source);
     void Heal(uint type);
     void OverrideActiveAbility(const string &in ability);
-    void ChangeStatBoost(Statistic stat, int8 amount);
+    void ChangeStatBoost(Statistic stat, int8 amount, bool selfInflicted);
     uint GetFlatStat(Statistic stat) const;
     uint GetBoostedStat(Statistic stat) const;
     uint GetBaseStat(Statistic stat) const;