Add first layer of gemmBatched
Pass the proper arguments to gemmBatched().
Make gemmBatched work finally.

(Could the cublas docs make any more effort to not mention that the arrays have to be GPU memory?  Clearly nobody needs to know that.)
Batch the allocations and transfers to try to be faster.
Merge pull request #12 from abergeron/add_batch

Add first layer of gemmBatched