config: support for endpoints without paramaters

* Adds new option to automatically include all endpoints without
  parameters. In order to enable this feature set
  SITEMAP_INCLUDE_RULES_WITHOUT_PARAMS to `True`. (addresses #2)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
config: support for ignoring endpoints

* Adds support for ignoring certain endpoints through
  SITEMAP_IGNORE_ENDPOINTS configuration option.  (closes #2)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>