removed deprecated exercises, moved recommendation answers to numpy folder, and

removed deprecated exercises, moved recommendation answers to numpy folder, and
moved software engineering into python

W. Trevor King: I dropped everything from the original 69fa3b0 except
for the python/testing/ modification.

Conflicts:
	python/numpy/engine/recommend.py
	python/numpy/engine/segaran-recommend.py
	python/numpy/long_exercise.rst
	python/sw_engineering/README.rst
	python/sw_engineering/animals.txt
	python/sw_engineering/big_animals.txt
	python/sw_engineering/dev_notes.rst
	python/sw_engineering/dingwall_animals.txt
	python/sw_engineering/fergus_animals.txt
	python/sw_engineering/macguffin_animals.txt
	python/sw_engineering/merida_animals.txt