for PyRAF #179 and #3; no longer assume X11 on OSX - if no info do otool check
for PyRAF #179 and #3; no longer assume X11 on OSX - if no info do otool check

git-svn-id: 40b96386cbba86590ff9370e0ea614b5cc88fc13@44899 fe389314-cf27-0410-b35b-8c050e845b92

spacetelescope/stsci.tools