Update to version mownfish2

1. update to version 2.0.0
2. remove script bin/mownfish, add python entry_point cmd/mownfishd.py
3. make wsgi.Tapplication and wsgi.Server independent, in order to make multi
entry points of application more convenient
3. remove legacy funcs in configs

	modified:   mownfish/__init__.py
	new file:   mownfish/cmd/__init__.py
	renamed:    mownfish/bin/mownfish -> mownfish/cmd/mownfishd.py
	modified:   mownfish/domain/__init__.py
	modified:   mownfish/util/config.py
	modified:   mownfish/wsgi.py
	modified:   setup.py
Update v2.0 README

	deleted:    AUTHORS
	modified:   README.md
	modified:   mownfish/static/favicon.ico