This change obseletes Mac OS X 10.7 and 10.8 which are not supported
by Qt 5.8.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7613 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
Also updated developer instrutions for modifying the DMG root folder
.DS_Store file.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@6130 ab8295b8-cf94-4d9e-aec4-7959e3be5d79