admin: Better production config for FoodTruck, provide proper first site. * Use a `settings` object to configure Flask. * Accept an `app.cfg` file in the admin folder to configure Flask. * Get a proper first site name when the cookie isn't set yet.

syntax: glob
*.pyc
*.egg-info
__pycache__
venv
tags
bower_components
node_modules
build/lib
util/messages/_cache
util/messages/_counter
dist
docs/_cache
docs/_counter
foodtruck/static
piecrust.egg-info
piecrust/__version__.py
.ropeproject