Crash fix equal_computations() again and scan opt speed up.

Add sort.grad support for vector and matrix when axis is None.

Fix the detection of where cuda is installed.

inserting missing comma when adding '-ccbin' to direct argument flags

betatim provided a fix to Theano/Theano#1912 in commit Theano/Theano@bb4b1a5
however that fix did not include a comma on the end of the line, causing the
'-ccflags' to be merged with the next string '--fmad'

Scan crash

Crash fix broadcast

Shape check input

Better error when missing inputs.

Svd op

Swapaxes