Raspberry Pi case bolted

This case is a derivative of "Raspberry Pi Case" thingiverse.com/thing:34527 designed by Kasey.

2 Modifications are made:
- M3 bolts with a length of 20 mm can be used (only ones I had in stock).
- The hole for the powersupply is widened in order to use the connector of the RS supplied powersupply. Dimension of connector is 7.2x10.2 mm, hole is slightly bigger.