add multithreading.py complex mutilthreading
	new file:   http/__init_.py
	new file:   http/client.py
	new file:   http/https_connection.py
	new file:   http/https_connection.pyc
	new file:   http/myexceptions.py
	new file:   http/myexceptions.pyc
	new file:   http/myhttp.py
	new file:   improve_plural.py
	modified:   multithreading.py
	modified:   python_tips.py
	new file:   regression.py
	new file:   soundex.py
	new file:   yield.py
	new file:   "\346\210\252\345\233\276.py"
update
update shell-tips and python-tips.py