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
The DMG volume name must not change between versions as it invalidates
the .DS_Store file backgound image.
Merged from wsjtx-1.4 branch.
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4548 ab8295b8-cf94-4d9e-aec4-7959e3be5d79