Merge pull request #10 in CASA/casaviewer from CAS-13020 to master
* commit 'e496fc2975bf0f3cacbef349351bb3147f8a03f3':
Update casa-source
increment casaviewer build.conf entry (CAS-13020)
more work on casaviewer/master merge (CAS-13020)
added check for --rcdir and --nogui in sys.argv for viewertool