Major cmake config overhall for freedv mingw build. Add freedv icon to installer and start menu entry. Add README.cmake for codec2-dev.


git-svn-id: https://freetel.svn.sourceforge.net/svnroot/freetel/fdmdv2@1248 01035d8c-6547-0410-b346-abe4f91aad63
Forgot to svn add the readme.

git-svn-id: https://freetel.svn.sourceforge.net/svnroot/freetel/fdmdv2@1249 01035d8c-6547-0410-b346-abe4f91aad63
Allow building against the system sox library

Provide SYSTEM_SOX=y to build against the system libsox instead
of downloading, building and linking staticly.

The default of linking staticly remains the same.


git-svn-id: https://freetel.svn.sourceforge.net/svnroot/freetel/fdmdv2@1250 01035d8c-6547-0410-b346-abe4f91aad63