Don't push out the outputs of an 'as_while' Scan

__props__ for theano/compile/tests/test_debugmode.py

[TESTS] this fix a test while having concurrent PR that force pep8.

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