removed outdated dummy assignment code that originally prevented an unsed argument gcc warning for __pyx_self, fix one more case where __pyx_self needs to be marked as unused

--HG--
rename : tests/run/test_generator_frame_cycle.py => tests/run/generator_frame_cycle.py

fix CythonInclude after importlib changes, avoid searching for the built module, avoid changing sys.path

Conflicts:
	Cython/Compiler/ParseTreeTransforms.py

Revert Numpy 1.7 hacks

This reverts commit 95b6e693.

This reverts commit 1eabb1c6.

This reverts commit 6f2271d2.

Conflicts:

	Cython/Compiler/ParseTreeTransforms.py

This reverts commit 29d68530.