Make as_op instances pickleable.
Add a test for the pickle functionality.
Merge pull request #2021 from abergeron/pickle_as_op

Make as_op instances pickleable.
Fixed "cublasHandle_t handle" declaration in cuda_ndarray.cuh.
Required for cuda_convnet compilation in pylearn2 in Windows
Merge pull request #2031 from serge-m/master

Fixed "cublasHandle_t handle" declaration in cuda_ndarray.cuh.