Support nil progress bars.
Use path/filepath instead of path.
Support the FRAGLIB_PATH environment variable.
Allow easy opening of SCOP PDB files using SCOP domain identifiers.

Requires the SCOP_PDB_PATH environment variable.
Make IsPDB smarter. Detect SCOP domains, support new syntax, etc.
Small utility to split FASTA files into a file for each sequence.
Clustering Mattbench results.
Provide a nice abstraction for handling bowable files in parallel.