PX15C new HW design

[agarza]

The title may be somewhat deceptive, as it still uses the same electronic design. What has changed is the layout of the parts and the buttons used.

Surprisingly, I manage to fit all through-hole parts in the same form factor of the original voyagers.

The buttons have a clear keycap cover "a la cash register".
And has a simple 3D printed case.

Oh, and I messed up the f and g, they should have been black.