Begin documenting what antenna versions are in the repo
This is my best understanding of the differences between the different helical designs. I'm sure this can be improved, so please let me know if I've left anything out or got anything wrong.
IIUC, the Helical designs have been numbered like so:
If that's the case, perhaps UHF-435-8 can be labelled "version 5"? If so, it might be good to incorporate those version numbers into the directory names (UHC lhcp-version_1, UHF-434-8-version_4, UHF-435-8-version_5, etc). If that's acceptable, I can make it part of this PR or submit another one.