C code for GpuIncsub, and a new CUDA kernel for one special case

Fix an optimization crash of local_gpu_elemwise_0.

Call to theano.compile.rebuild_collect_shared will clone variable that have owner.

Change dtype of shared variable to floatX

Add erfinv and erfcinv ops

Fix test for when floatX=float32

Borrow=True is dangerous if one output destroys another

Re-add part of the dtype constraint on out grads

Batched dot22

This is a temporary fix until we fix the behaviour of borrow=True
for the general case.

Re-add (and update) bug fix description.

Err msg unalign

Doc python mem

C version of view op

Fixes after code review

INTERFACE CHANGE: Disable using unaligned tensor in all case. We supported it for python code before.

Added Python 3 support to setup.py