Importing more material from The Hacker Within

Importing more material from The Hacker Within

W. Trevor King: I dropped everything from the original 6e7b321 except
for the lessons/thw-testing/ renames.

Conflicts:
	lessons/index.html
	lessons/thw-python-debugging/basic_exceptions/index_error.py
	lessons/thw-python-debugging/basic_exceptions/io_error.py
	lessons/thw-python-debugging/basic_exceptions/key_error.py
	lessons/thw-python-debugging/basic_exceptions/name_error.py
	lessons/thw-python-debugging/basic_exceptions/syntax_error.py
	lessons/thw-python-debugging/basic_exceptions/type_error.py
	lessons/thw-python-debugging/basic_exceptions/value_error.py
	lessons/thw-python-debugging/conways_game_of_life/1_conway_pre_linted.py
	lessons/thw-python-debugging/conways_game_of_life/2_conway_pre_formatted.py
	lessons/thw-python-debugging/conways_game_of_life/3_conway_pre_debugged.py
	lessons/thw-python-debugging/conways_game_of_life/4_conway_pre_profiled.py
	lessons/thw-python-debugging/conways_game_of_life/5_conway_final.py
	lessons/thw-python-debugging/conways_game_of_life/Conway's Game of Life - Debugging Example.ipynb
	lessons/thw-python-debugging/examples/linting_example.py
	lessons/thw-python-debugging/examples/pdb_example.py
	lessons/thw-python-debugging/examples/profiler_example.py
	lessons/thw-python-debugging/examples/segfault.py
	lessons/thw-python-debugging/examples/style_example.py
	lessons/thw-python-debugging/tutorial.md