Could the tiny island of Guam become the first U.S. territory to pass a medical marijuana law? Yesterday, a bill was introduced into Guam’s 15-member legislature that would give qualified patients legal access to medical marijuana and create a system of “compassionate health care centers” to grow and dispense it. Guam now joins more than a dozen U.S. states that have considered or are considering medical marijuana legislation this year. It’s still unclear what chances the Guam bill has of passing,…