One of the final single-family residential holdouts of the Rainey Street District has officially hit the market this week. The 1945 bungalow at 701 River Street, located on a 3,375-square-foot lot at the corner of Rainey and River Streets in the heart of the rapidly-developing entertainment district, is listed with an asking price of $10 million — and this modest home represents one of the last reminders of…