Merge pull request #29 from hunse/prod-update

Partial implementation of ProdUpdate
partial support for ProdUpdate
prints and timing stuff
Merge branch 'master' of github.com:jaberg/nengo_ocl
fixes galore
Added our first benchmark, fully profilable.

- To get profiling working, I added a PythonPlan class
  for basic profiling of Python functions.
Added code to convert Python functions to OCL.

- It's almost working, I think
Can now convert Python to OCL!