Refactoring to fit shh-dlce deployment scheme

[xrotwang]

• Removed submodules: Logo and favicon from lingdb/cognac-logo have been
  added to cobl/static/logo.
• Turned into python package:
  • Added setup.py
  • REQUIREMENTS replaced by install_requires in setup.py
• Renamed package from ielex to cobl
• Renamed static URL from /ielex/static to /static
• Allow running the app with gunicorn --paste ...:
  • added entry point in setup.py
  • added cobl:main, reading config passed in via paste config file
  • The paste config file now supersedes local_settings.py.
• To make sure SQL dumps can be restored to a DB cluster with different
  user and ACL setups, the dumps are now created using pg_dump's
  --no-owner and --no-acl options.
• To make the SQL dumps compatible with our deployment infrastructure,
  they are now compressed using gzip rather than bzip2.

The app now has to be installed running

pip install -e .

and can then be started with a development.ini looking like

[app:main]
use = egg:cobl
sqlalchemy.url = postgresql://postgres@/cobl
debug = True
secret_key = abcd

[server:main]
use = egg:waitress#main
host = 127.0.0.1
port = 6543

running

gunicorn --paste development.ini