Waveshare GameHat Case with Grip Pads

First off, thanks to Zuendy and Tguellich for their awesome designs. It gave me some ideas and a base to improve the case a bit, in terms of ergonomics, heat dissipation and a bit of flair (maybe :P)

Just download Zuendy's original design for the top face and button plates.

What I added:
1. **Update: Bottoms pads v2.1 have been added. More ergonomic than before. Previous version was a bit too thin and slightly misaligned. Printed and tested. Please give some feedback. Thanks.**
Bottom pads (printed in TPU, infil 15-20) for better grip and comfort. Gripping the original flat base was a bit uncomfortable after some time due to right angled edges.
2. Added Tguellich's logo and plenty of vent holes. RPI 3b+ does get really hot!
3. Raised beveled surround, flushed with original shoulder button pads. Also enlarged the holes for them and offset outwards. Original design was a bit offset inwards.
4. Flattened side button surrounds, enlarged holes big enough for buttons to be pres