pep8
Make the cvm and c linker raise error message as the vm and c|py linker.

This add the op and the outputs of the apply node in the message error.
In cvm, vm, py, c|py and debugmode, print more info when the execution of an apply node crash.

We print the inputs shape and strides now. We can't do that with the c linker.
Fix test with numpy 1.7.1 or python 3.3.0.

The error message changed.
update doc.
Remove now useless exception_verbosity extra info that is now added by default.
Merge pull request #1428 from nouiz/err_msg

Better error message when an apply node execution fail.