[aprssig] New home page for Dire Wolf TNC software

[John Langner WB2OSZ]

The Dire Wolf soundcard TNC / APRS digipeater / IGate / APRStt gateway is
moving to a new home.

If you have any links or bookmarks to the old location,
https://home.comcast.net/~wb2osz/site/ , please update them to the new
location, https://github.com/wb2osz/direwolf 

On the Releases page, https://github.com/wb2osz/direwolf/releases , you will
find a preview of some new features in the next release:

* Enhancements to APRStt gateway including Morse code and speech responses
to APRStt tone sequences.

* APRS Telemetry Toolkit.  One example includes an A/D converter attached to
a Raspberry Pi

* Support for Mac OS X.