GoPro Hero 3+ Frame

This is a remix of two different models:
* Nazzaf's: https://www.thingiverse.com/thing:1198514
* Barspin: https://www.thingiverse.com/thing:113764

Barspin's frame held the camera nice and tight but made it difficult to insert and remove the GoPro camera and did not have the openings correctly placed for the Hero 3+ mics. Nazzaf's frame made it easy to insert and remove the camera, had the openings placed correctly for Hero 3+ mics, and had bigger holes for the buttons (which I liked since I