In many different scheduling strategies, a node is typically given
a certain weight based upon its values that are important to the
overall strategy. Exposing a weightedNode structure as well as a
new weightedNodeList type allows one to operate upon a set of nodes for
sorting purposes by assigning weights to each node and calling
sort.Sort() on a weightedNodeList.
Signed-off-by: Matthew Fisher <matthewf@opdemand.com>