It has been 30 years since “Ghostbusters” hit it big and became a beloved, all-time classic.  But when a re-imagined “Ghostbusters” opens on July 15, it won’t feature the same guys -- or any guys for that matter -- putting on the proton packs to save the world.  A movie re-do with a gender swap would be newsworthy for any film, but for one as iconic as “Ghostbusters”?  To say this is an important milestone would be an understatement, and it deserves a cinematic slow clap for its boldness and all-star female cast including (left to right at top) Leslie Jones, Melissa McCarthy, Kristin Wiig and Kate McKinnon.