ODroid Go buttons

I remixed the buttons from jspecer87 as I wanted to remove the A/B text and adjust the B button to work with the ODroid Go (removing one alignment tab).

I also noticed that the A button was 0.50mm shorter than the B so I adjusted that as well although I'm not sure if that is shorter by design (and originally) - I just wanted both buttons to be the same height.

Support has been added underneath each tab so you should be able to print it easily without support - they pop off easily & cleanl