Not working.
Moving to
- a connection per process.
- a session per task function, such as get, parse, etc.
	new file:   connection.py
	modified:   memo.txt
	modified:   models.py
	modified:   tasks.py
	modified:   test_fetch.py
	modified:   test_get.py
	modified:   test_models.py
	modified:   test_parse.py