Test case for new StingNode behaviour.
Update tests.
Use jslix.Client.send method instead of jslix.Client.connection.send.
Add caps to all presence stanzas.
Handle, verify and cache entity capabilities.
Update tests.
Update example.
Add NS for disco#items.
Register disco#items as feature.
Update tests.
Enable logging only with debug flag.
Now jslix.disco don't depend from jslix.caps plugin.
Update example.
Update tests.
Add toString method for stanzas.
Remove code duplication.
Return empty_stanza from itemsHandler.
Update tests for jslix.version.
Update tests for jslix.stanzas module.
Add disconnect signal to jslix.connection module.