[digitalradio] Updated online help for MMTTY version 1.66F is now available

[Dave Bernstein]

Thanks to Joe W4TV and Al VE4ABU, updated online help is now available 
and included in the release. Its also available independently via 

<http://www.dxlabsuite.com/MMTTY/mmtty.chm>

MMTTY 1.66F is available via 

<http://www.dxlabsuite.com/MMTTY/mmtty166F.zip>

    73,

         Dave, AA6YQ