quich frontend, primivius (chat): better avatar handling: - new getAvatar method in QuickApp which request vCard if avatar if needed and return default avatar is no avatar is found - frontends based on quick frontend can now specify if they handle avatar or not using AVATARS_HANDLER - when avatar is updated, occupant widget(s) and all message widget(s) of the concerned entity are updated

Use this module to temporary store files that need to be integrated to other
projects such as Wokkel.

For example, the changeset that introduced this folder adds RSM (XEP-0059)
support to Wokkel. The files in sat.tmp.wokkel are imported over the initial
wokkel files from sat.plugins.__init__.py