Removed references to the SALVE root dir

The root dir of the repo is not useful when installed as a package, since it is
simply the containing dir for the package itself. Moved default_settings.ini
into the package.
Update setup.py to include default_settings.ini

This is part of the package_data field passed to the setup, as part of an
"include all .ini files" directive. This way, if more files are packaged up in
the future, they will be included as desired.