Got nengo_ocl passing all tests, synced with nengo

- Removed transpose handling in setup_views_MultiProdUpdate,
  since no ops have an `xT` attribute anymore.
- Renamed SimDirect to SimPyFunc to accord with Nengo
- Fixed reshaping problem in SimPyFunc
Merge pull request #52 from hunse/master

Got nengo_ocl passing all tests, synced with nengo