The impact of an idea can be considerable. When that notion is infused with the energy of a mass collaboration, it can become huge. And, when that initiative is linked with others of like tenor, a movement is born. So it was when the women of America united to get behind a cause that liberated them from the shackles of stifling limitation, a culture-changing crusade that reshaped society forever, the subject of the engaging new documentary, “She’s Beautiful When She’s Angry.”