Some clients can be strings other than 'output', for instance 'context'

Conflicts:
	theano/gof/cc.py

This happens when linker=CLinker

Flake8 tensor

Don't use type.make_variable() to have more stack trace

Make local_merge_alloc apply in more case

Cpu Contiguous

Fix memory leak of descriptors in cudnn bindings.

Fix recompilation for the memory leak just fixed

[WIP] Allow numpy.exp(theano_var) to build a graph.

Fix test in float32 and try to run floatX=float32 with python 2.6 in travis.

Added examples to Unique + some flake8 for tensor/extra_ops.py

Flake8 gof

Add elemwise `conj` to `sparse`.