Introducing OpenPlotter hats!!!

[pcmm]

We had this discussion at the beginning and we decided not to add a stacking header:

- The GPS antenna can not have any board overhead.
- There is no space for the header.
- Price
- The board includes pins for UART GPIO to be used with pypilot controller.

This was designed to be always on top. The rest of projected hats will be stackable and one of them will allow access to GPIOs.

Thanks.  The GPS antenna has an external connector to use a good external antenna anyway!  In my case I need access to the i2c bus, the 1W pins and a couple of others.  I'm using a "side shift" stackable header, but it's less elegant than just having access to those pins in the first place.    The stackable header cards like to say they don't need soldering ( of course they really do!)   Just a thought!