avoid the py2app options when py2app isn't installed, as they trigger warnings
avoid the py2app options when py2app isn't installed, as they trigger warnings

git-svn-id: 83da0ac6f29971f322a07cce10fdfd58b53908d1@1021 2efe2221-f5e4-0310-9a2e-dd64ea3c545c

ShaneMcC/hellanzb,ShaneMcC/hellanzb