Remove extra track from D2; general PCB cleanup

Change SW1 footprint to 1.0mm vertical

Specify KiCAD ver., because this is important

Update SW1 footprint; fits up to 1.5mm pin width

Specify SW1 as 'Sub-miniature DPDT switch'

Update BOM to specify switch pin spacing

Add custom switch footprint; update PCB layout

Needed for TI 74HCT244 variant pinout (custom)

Update README.md

Previous commit also fixes TJTAG version typo. Current commit adds a bottom view photo and adds some detail regarding the jumpers on the prototype circuit.

Update README.md

Add top view of prototype circuit design. Remind self to take a photo of the bottom view later.

Initial commit