Rename Profile to Config
New module: config.py
Create config if not exists
Add TwitterConfig.list_accounts
Catch NoOptionError
Apply TwitterConfig; The sub-command config is introduced.
Merge branch 'master' into config

Conflicts:
	ptwit/ptwit.py
Remove support for old config style
choose_config_name accepts config argument
Rename TwitterConfig to PtwitConfig; Remove unused tests
Merge branch 'config'

Conflicts:
	ptwit/ptwit.py
Remove profile related commands and options
Merge config.py into ptwit.py
Rename config all command to config accounts
Rename following command to followings
Download as many tweets as possible by default
Remove import config statement
Fix broken use of twitter API
Rename command option specified_format to format
Replace render_template with string.format

- remove function render_template and function lookup

- add function from_now

- rewrite default format strings