preprocessing functions use correct theano dims
preprocessing functions use correct theano dims

closes #88

Rochester-NRT/AlphaGo,Rochester-NRT/RocAlphaGo,wrongu/RocAlphaGo,Rochester-NRT/AlphaGo,hiropppe/RocAlphaGo,Rochester-NRT/AlphaGo,vftens/RocAlphaGo,MaMiFreak/RocAlphaGo