[Initial import at version 1.1.
Will M. Farr <farr@mit.edu>**20070509142741] 
[TAG 1.1
Will M. Farr <farr@mit.edu>**20070509142802] 
[Fixed doc bug: |:permutation| --> |:permutations|.
Will M. Farr <farr@mit.edu>**20070813151703] 
[Ready for export.
Will M. Farr <farr@mit.edu>**20070907225448]