Finally a working IUPAC module.

1. Corrected generation of *COMPLEMENT-ALIST*.
2. Removed unnecessary debug output.
3. Updated IUPAC code alist.
User interface is now object-oriented.
Added a simple FASTA parser.
The first, nonsense test file (for the FASTA parser).
A simple workspace, i.e. a set of working files.
Workspace code added to the system definition.