suffix and `fetch_groups` deprication
* `lazy_give` new function for giving a lazy object of the type. `LazyObject` has moved to own module `types.lazy`
* deprication of `fetch_groups` attribute and `views.FetchSettingsView` as a replacement
* uppercase for variable name is mandatory
* `call` suffix for `GiveCallMixin`. you can call no-args types like `content_settings.VAN_NAME__call("value")`
* DictSuffixesMixin - use dict for suffixes, where values are lambdas
* `suffix` is URLs for getting value from suffix
* new URL `fetch/<str:name>/suffix/<str:suffix>/`
* test covarage: 89%