Added Johanson 2450AT18A100 and 2450AT43F0100 antennas
requested to merge cnieves1/kicad-footprint-generator:github/fork/cnieves1/johanson_2450AT18A100 into master
This PR requires custom_name_format support, so it depends on: !769 (merged)
Datasheets:
https://www.johansontechnology.com/datasheets/2450AT43F0100/2450AT43F0100.pdf
https://www.johansontechnology.com/datasheets/2450AT18A100/2450AT18A100.pdf
