WASHINGTON — Retired Justice Stephen Breyer is getting a different title: professor.Harvard said Friday that Breyer, who retired from the Supreme Court June 30, is re-joining its law school faculty. Breyer is a graduate of the law school and first joined the Harvard faculty in 1967. He continued to teach at Harvard after he became a federal appeals court judge in 1980 until former President Bill Clinton nominated him to the Supreme Court in 1994.Harvard said in a statement that Breyer will “teach seminars and …