We have a nationally-ranked dance school, so you will not want to miss its production of “Sleeping Beauty,” this weekend at Clowes Memorial Hall. We’ve created a handy guide to the plot and characters. THE MAIN ACTORS: Princess Aurora (Lindsay Moncrieff, Erin Langston), Prince Desire (Garrett Glassman), Lilac Fairy (Jenny Martin), Carabosse (Kristen Francomano) ACT…