gpuelemwise

fixes to make the behaviour of the cuda shared constructor more strict on accepting only float32 ndarrays

lower profiler overhead by moving computation into the printing phase instead of the recording phase.

Usefull to track the overhead of theano fct call.

Committing before actual changes take place.

THEANO_FLAGS and THEANORC environment variables are now right-dominant (right-most definitions have precedence over the ones on their left)