Pull request #686: CAS-13973 add msmd rxbands() and subwindows() for ALMA
Merge in CASA/casa6 from CAS-13973 to master
* commit '19158869db3e6dff96f355b5fc7e9bb31a5bdb77':
revert casacore pointer to non-forked version
commit casacore pointer after merge
general tightening up of inline docs for new methods
update test result
updated docs
fix almaReceiverBand method in MSMetaData
update rxband() docs, casacore pointer
add another rxband() test
update for bug fix CAS-13973 added new methods rxbands() and subwindows() to msmetatdata
