Improve MUC handling.
Add command "send" to add feeds to other JIDs.
Ad-Hoc: Add functionality to specify JId to commit actions on upon.
Add subscription preview upon adding a subscription.
Add project Jabber RSS Transport to bots list.
Add projects Psi and Psi+ to clients list.
Fix ping functionality when activated as component (thank you Guus and MattJ).
Add initial code for XEP-0060: Publish-Subscribe.
Fix case-sensitivity with setting keys sent in-chat-command (Thank you mirux)
