Quality values

1. A name of a quality bit pattern,

           Name      Bit pattern        Name      Bit pattern
           GOOD      00000000           PATCHED   01000000
           BAD       00000010           ARITH     00000100
           MISSING   00000001           IGNORE    10000000
      

2. A binary number, up to 8 bits long. This is read in as a character string, and converted to a numeric value later.

   The binary number does not HAVE to be 8 bits long i.e.

                         11 = 00000011