library: jumpers, and outline of Adafruit TFT board.
board, schematics: many adjustments.

* Different jumper devices.
* Adafruit TFT board outline.
* Moved VIA port headers upwards.
* Overhauled top-right power supply layout.
* Compacted vias under ROM, route power through freed space.
* etc...
board: many layout / routing adjustments.

In particular, expansion port has been shifted down closer to edge.