get rid of __signature__ property for cyfunctions again as inspect.py in Py3.4 can do the same thing more efficiently all by itself now (only commenting it out because it could potentially become a feature again at some point)

Allow docstrings on cdef classes in .pxd files

Added patch from Nikita to properly parse extension type attribute docstrings in PXD files as well as source files

--HG--
extra : rebase_source : a94cc8500c29558b78ee50fbb923cd19a779b33e

tutorial for Python arrays

--HG--
extra : amend_source : 7954c320c39d51cde9ac7d4368258ceb56a3bc2f

Conflicts:
	CHANGES.rst