FMmap: Code update and periodic updates

Due to a renewed public interest in our FMmap service, we have updated our FMmap map generators (for both FM and AM) to reflect the use of LMS for FM.  

We have also set up a weekly update that will run on Sunday mornings to refect a snapshot of the database at the time.

FMmap is an interactive map that shows the locations of FM and AM broadcast facilities that are in the database for nations supported by FCCdata.org

https://recnet.net/fmmap