Pull request #33: CAS-13868 Remove obsolete X11 headers
Merge in CASA/casaviewer from CAS-13868 to master
* commit 'e3b27b3f287d8330e0e8107819eb26c43bf57542':
Advance casa-source pointer to head of casa6 CAS-13868
Set casa6 branch commit and add X11 dir
Fix code for casacore changes
explicitly set permissions in the app