update code to new compyte interface.
Fix compilation error due to type error.
Fix gpuarray op_lifter when the gpu op was inheriting from the OP it replace.
Fix some compilation crash of the new GpuSubtensor
Make the new GpuSubtensor tests run with it!
Merge pull request #2 from nouiz/abergeron-compyte2

Fix a bunch of c_code (that was apparently not tested since there was a bug in the tests).