AST-1540 Merge baseline selection code
Put all base line selection code in base/BaselineSelection.cc and remove common/BaselineSelect.cc.
Use an RAII object for temporarily overriding a casacore error handler.
Put all base line selection code in base/BaselineSelection.cc and remove common/BaselineSelect.cc.
Use an RAII object for temporarily overriding a casacore error handler.