The AtoB class is a utility program designed to "translate" an ASCII
BASE 64 encoded blob into a BINARY BASE 64 encoded blob. It assumes
that the name of a data file is passed to the program via the command line,
and that the contents contain a blob encoded in an ASCII BASE 64
format. Note that the data file may contain an optional "-----BEGIN" header
and/or an optional "-----END" trailer.
The program may be invoked as follows:
AtoB <input filename> <output filename>
NOTE: <input filename> must contain an ASCII
BASE 64 encoded blob
<output filename> contains a BINARY
BASE 64 encoded blob