Merge pull request #161 in CASA/casa6 from CAS-8586 to master
* commit '350c29f9c8ecf27757e8ad72ed1661c021be8e9a':
added a note to savemodel documentation
added test_cube_chanchunks_savevirtual in test_tclean
Fixed an initialization problem with chunking and having last major cycle after only one major cycle.