settings: clean up defaults
Delete some obsolete stuff.
Move kegweb.wsgi and local_settings example files into deploy dir.
Move setup.py to top level.
Move `pykeg/src/pykeg/` to `pykeg/`.
setup: remove explicit distribute dependency; remove protobuf link.

PyPI's protobuf distribution seems to work fine these days..
settings: update twitter socialregistration name
Move version into pykeg module.