v1.0.0

Changelog

a2e1bb0 basic support for custom formats defined in files
81b5388 basic support for custom formats defined in files
d3dbeea build: basic Goreleaser + Github Actions setup
5355a74 correct rotation span for typical pots
ff670eb correctly document attribute defaults
b406e65 feature: header/footer Y offset global attributes
e866dd2 fix: legend "below" used wrong spacing due to alignment
7da3b15 implement polar => cartesian coordinate conversion
30adea6 missing license text
bcf4574 only create rail keepouts for formats with rails
cda1980 only create rail keepouts for formats with rails
6965421 resync, unconflict
69abdde schroff: spec-file panel format support
fbb3eb5 schroff: use log for all output messages
d453808 support more attribute value types
f8fe1bc support tick marks around holes, optionally with labels