Returns node from within this particular ``DirNode``, so it is now
        allowed to fetch, i.e. node located at 'docs/api/index.rst' from node
        'docs'. In order to access deeper nodes one must fetch nodes between
        them first - this would work::

           docs = root.get_node('docs')
           docs.get_node('api').get_node('index.rst')

        :param: path - relative to the current node

        .. note::
           To access lazily (as in example above) node have to be initialized
           with related changeset object - without it node is out of
           context and may know nothing about anything else than nearest
           (located at same level) nodes.

def get_node(self, path):
        """
        Returns node from within this particular ``DirNode``, so it is now
        allowed to fetch, i.e. node located at 'docs/api/index.rst' from node
        'docs'. In order to access deeper nodes one must fetch nodes between
        them first - this would work::

           docs = root.get_node('docs')
           docs.get_node('api').get_node('index.rst')

        :param: path - relative to the current node

        .. note::
           To access lazily (as in example above) node have to be initialized
           with related changeset object - without it node is out of
           context and may know nothing about anything else than nearest
           (located at same level) nodes.
        """
        try:
            path = path.rstrip('/')
            if path == '':
                raise NodeError("Cannot retrieve node without path")
            self.nodes  # access nodes first in order to set _nodes_dict
            paths = path.split('/')
            if len(paths) == 1:
                if not self.is_root():
                    path = '/'.join((self.path, paths[0]))
                else:
                    path = paths[0]
                return self._nodes_dict[path]
            elif len(paths) > 1:
                if self.changeset is None:
                    raise NodeError("Cannot access deeper "
                                    "nodes without changeset")
                else:
                    path1, path2 = paths[0], '/'.join(paths[1:])
                    return self.get_node(path1).get_node(path2)
            else:
                raise KeyError
        except KeyError:
            raise NodeError("Node does not exist at %s" % path)