[Dx4win] Updated DX4WIN.MAS1 master callsigns - 8 May 2013

[Jim Reisert AD1C]

I updated the master callsign database for DX4WIN.  You can download
it from here:

   http://dx4win.ad1c.us/data/calldata.html#Master

Better yet, use the DX4WIN Data Updater:

   http://dx4win.ad1c.us/update

This database is based on the Super Check Partial database released 8 May 2013.

73 - Jim AD1C

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Jim Reisert AD1C, <jjreisert at alum.mit.edu>, http://www.ad1c.us