plugin XEP-0054, quick frontend(app): various improvments: - memory.cache is now used - getAvatar and setAvatar has been renamed to avatarGet and avatarSet to follow new convention - getAvatar now return (optionally) full path, and may request vCard or only return avatar in cache - getAvatarFile has been removed as it is not needed anymore (avatarGet can return full path) - getCard has been removed from bridge as it was only used to request avatar - new internal method getBareOfFull return jid to use depending of the jid being part of a MUC or not - cache is now set per profile in client, instead of a general one for all profiles - thanks to the use of memory.cache, correct extension is now used in saved file, according to MIME type - fixed and better cache handling - a warning message is shown if given avatar hash differs from computed one - empty hash value is now in a constant, and ignored if received - QuickApp has been updated to follow new behaviour - Primitivus has been fixed (it was not declaring not using avatars correclty) - jp has been updated to follow new methods name