[Radioig] News for the ObsCore Radio extension

[BONNAREL FRANCOIS]

Dear radio astronomy fans,

      - The ObsCore extension for Visibility data has been extended in 
scope to become ObsCore extension for radio data

      - It is intended that it becomes a DM WD ASAP. SO it has been 
imported into a new ivoa-std github repository : 
https://github.com/ivoa-std/ObsCoreExtensionForRadioData (thanks to 
ivoa-std owners and DM chair)

      - All recent comments by Alessandra, Vincenzo, Marco, John and 
answers by Mireille, Baptiste and me have been reported there as issues.

      - The old repository 
https://github.com/ivoa/ObsCoreExtensionForVisibilityData is still there 
for legacy discussion, but you should not use it for new issues. Go to 
the new repository instead.

      - For long term legacy I opened an ivoa twiki page 
(https://wiki.ivoa.net/twiki/bin/view/IVOA/ObsCoreExtensionForRadioData) 
accessible form the main RadioIG page 
(https://wiki.ivoa.net/twiki/bin/view/IVOA/IvoaRadio). The content is 
the same than the issues on the github repository.

     - For further discussion use whatever you prefer : Twiki edition, 
github issues or PR, or emails on this list. I don't recommend to use 
the google doc document created by Alessandra and others any longer. The 
three supports should be enough.

     - I plan to write a first github PR with all non-controversy 
changes in the coming days

Cheers

François as editor of this specification project