APIv4

New fields:

• Added
• Last-Modified

APIv3

• Add Region field to metadata, that has the same meaning as the State field.
• The State field is now deprecated and will be removed in the future.

APIv2

• Add Languages field to json index, this allows multiple languages for a radio station
• The Language field is deprecated and will be removed in the future
• Always populate the fields allCodecs, allBitrates and highestBitrate in the json index

APIv1

webradioFromIssue - modifyradio #633