Store one or more FitsTables in a FitsChan astPutTables
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algorithm. Since, in general, the calling application may not know which tables will be
needed - if any - prior to calling astRead, the astTablesSource function provides
an alternative mechanism in which a caller-supplied function is invoked to
store a named table in the FitsChan. Tables stored in the FitsChan may be retrieved using astGetTables.
The tables in the supplied KeyMap are added to any tables already in the FitsChan.
The astPutTable method provides a simpler means of adding a single table to a FitsChan.