Introduce XMPP listener, connection ok
Update OCCI XML scheme: top-level element for query request is 'capabilities'
Update xmpp client: begin handling presence and disco
Add entity capabilities shorthand sending
XMPP: GET ok
Fix mnesia backend (wrt new occi_store changes)
Update wrt change from exmpp to erim
Fix erim start
Add mailing lists info in README
Update ChangeLog