Add a basic script to compare the db_schema to the fs_schema. Allow SchemaViewer to be used without a request object Most use of self.req have been hidden in method that fallback on a simple behaviour when no req are provided. Several element have been sorted to ease comparison.

"""%(distname)s specific hooks and operations

:organization: %(author)s
:copyright: %(year)s %(author)s
:contact: %(author-web-site)s -- mailto:%(author-email)s
:license: %(long-license)s
"""