keyboardcomposer destroy fix and cleanups - We were destroying KeyboardComposer a little too much. Fortunately, we weren't passing the right number of arguments, so this was merely an error. - About the TODO comment removed: we don't need to use combine_dict since Submaster logic will be changed entirely when we/if we move to a SubServer world and keyboard composer will not be the wiser.

'''Internal class for StateManager'''

# warning: pseduocode
class NodeInstance:
    ip_addr?
    get_this_nodes_url()

    type = the node type (a subclass of Node)
        ops (get from type)
    input,output = the ports that are created for the node instance
    state = associated state