Small refactoring of jid module.
Add comment to buster config file.
Refactor isEntity and clone methods of jid.
Throw exception if user forgot pass storage in caps plugin constructor options.
Add clone method for BaseStanza.
Cache last presence stanza and use if on next caps updates.
Refactor clone method of jid.
Replace null with undefined in clone method of jid.
Add caps_changed siglar for caps module.
Pass obj instead of _obj to hooks.
Update tests for caps module.
Refactor check_hooks method in dispatcher.
Emit caps_changed only if data changed.
Merge branch 'master' of git://github.com/ComradeDOS/jslix

Conflicts:
	src/dispatcher.js