Repair other tests following the merge of the new backend.

Small stuff

Reported by Caglar directly to me.

Fix bug in scan merge optimization reported by Yao Li.

Support for a new type based on compyte in theano

Make tests try to run if they can.

Fix in local_dot22_to_dot22scalar

Fix the tutorial to make it work with python 32 and 64 bit.

Add tests and opt one more case.

new op wasn't added there.

Fix compilation crash reported in gh-1518 for gpujoin.

Be safer with the support code (in peculiar don't try to bake the C++ complex struct in the kernel code).

Also fix the call syntax for python <= 2.5

Fix the Cuda transfer ops and test them.  Also since the test will always fail unless initialized in a very specific way, mark it a potentially failing not to alarm users.