Remove the need for an intermediate buffer with a custom SgemvBatched kernel.

Also some small kernel speedups elsewhere.

Remove the need for an intermediate buffer with a custom SgemvBatched kernel.
b4b6a31e · Arnaud Bergeron · 496cb1c7 · b4b6a31e
--- a/theano/sandbox/cuda/blocksparse.py
+++ b/theano/sandbox/cuda/blocksparse.py