Raspberry Pi Zero W + RTC DS3231 case

Screwless case for Raspberry Pi Zero W (without pins) and RTC DS3231. Case can be mounted using cable ties.

**Update July 3, 2019:** New version - a little wider, with thicker walls and (optional) 4-pin connector for UART interface (you can connect to Raspberry Pi console without opening the case). V2 files are not interchangeable with the V1 files, due to dimensional changes.