Pull request #609: CAS-13850 support for beams stored as numpy arrays in image.restoringbeam()
Merge in CASA/casa6 from CAS-13850 to master
* commit 'f18c44094278515808ddca87947b05d90e19811a':
minor doc update
update test with new exception messages
ulong -> unsigned long to appease MacOS
refactor getting imageInfo and coordinates
support for beams stored as numpy arrays in image.restoringbeam()
image.beamarea() and .restoringbeam() updates. various test updates