New elemwise

NEWS.txt: NB added elemwise Trunc, Deg2Rad, Rad2Deg and Expm1 

Minor stuff (typos & PEP8)

Don't install SciPy deps for travisci

Mixed

fix crash introduced yesterday in MaxAndArgmax.

When we put a TensorVariable in a list, when we call as_tensor_variable on it,
this create a 2d tensor. We do not want that.

Minor stuff

Fix C code of Reshape when input is not c-contiguous

Ensure file descriptor is closed before trying to remove the temporary
file, as otherwise I suspect the removal might fail on some operating
systems. I think such a situation might happen only very rarely though
(maybe if disk is full?).

Mixed

Also add test that would have been able to catch it.

Fix updates in CVM

Cast values to floatX in tests