SainSmart Smart Controller LCD 12864 Case

This case is designed for the [SainSmart LCD Smart Controller 12864](https://www.amazon.com/gp/product/B00EYS5ELE), which adds an SD card slot and rotary control along with stop and backlight buttons to many 3D printer models. I had printed another design, but found that it was a bit lacking and so I felt like it was time to make my own.

This design is screwless, and the display assembly should sit on the rear posts with the top clamping on afterward, with no issues even at a low print quali