plugin XEP-0384: better bundle handling + misc improvments - public bundles are now retrieved only when needed (i.e. on MissingBundleException when encrypting a message) - a feedback is given to user when a message is received but it has not been encrypted for our device - fixed feedback on decryption error if message come from an other device of the client (i.e. it's a carbon copy) - setBundle if called in a "finally" if republish_bundle is set after decrypting a message