"Principal photography has begun on Roland Emmerich‘s drama Stonewall.  The film stars Jeremy Irvine (War Horse) as a young runaway who finds his way to the Stonewall Inn and is eventually swept up in events that would lead to the historic 1969 Stonewall Riots, which were a turning point in gay civil rights.  Although Emmerich is known for being able to blow stuff up real good, his first historical…