Most of the code in this package was written by Daniel Zerbino.

However, some code was reused with kind permission from:
- John-Mark Gurney, for his Fibonacci heap implementation 
(http://resnet.uoregon.edu/~gurney_j/jmpc/fib.html)
- Guy Slater, for his memory management routines 
(http://www.ebi.ac.uk/~guy/exonerate/) 
- Ewan Birney, for his hashing function
(ftp://ftp.ebi.ac.uk/pub/software/unix/wise2/)

