Zarel/Pokemon-Showdown — pull request #336 by V4Victini (2013-09-11 08:23:21+00:00)
Title: Stat overhaul

This introduces the following:
- Foul Play no longer uses the opponent's ability and item against the opponent.
- Confusion no longer uses your ability and item against you.
- Modifiers for stats in damage formula are now chained.
- onModifyStat events now affect the modifier and not the stat directly.
- Several abilities are now implemented correctly.
- Wonder Room is now implemented correctly.
- ignoreNegativeOffensive and ignorePositiveDefensive now check the Pokemon's boosts instead of comparing it's modified and unmodified stats
- useTargetOffensive and useSourceDefensive are now implemented correctly.