Merge pull request #29 from CarlosFdez/master

Multihit moves. That's all this pull request is for.
Yawn fails if target is already statused.
Implement Disable; add question.
Finish Thief and Trick
Bias RNG for moves with secondary chances.
Implement Trick Room.
Implement Transform.
Transform does not work on transformed pokemon.
Implement Fling.
Implement Bug Bite.
Implement Beat Up
Remove stray console.log
setStatus takes into account types.
Beat Up works for teams smaller than 6.
Implement Psycho Shift
Implement Gravity.
Tiny tweak to Gravity accuracy change.
Wrap 'it' in inner func to preserve variable.
Implement Future Sight/Doom Desire for 1v1.
Implement Baton Pass.