Added the new "Buzz" feature, which allows users to give others a little nudge.
Would be sweet to have a little buzz feature to nudge other users.
added XEP-0225: Attention feature to XIFF. But it seems that Spark is not inter-client compatible. I am using Pidgin and I can receive Nudge/Attention messages from Spark IM, but users of Spark IM are not receiving any of my Nudge messages.