simplicity proposal

I would like to propose a similar but more simple approach:
 * in the root of the buildout we shouldn't have any lazy configuration - only the one that is being used (probably symlinked)
 * in `./config/` I would suggest to use a convention that everything that starts with `_` shouldn't be used as a starting configuration (aka symlinked in root)
 * `development.cfg` should be only (one file that has all the dev sections)