GPG blowfish implementation integrated by jdassen@wi.leidenuniv.nl.

Rev: src/symmetric/blowfish.c:1.1
Rev: src/symmetric/include/blowfish.h:1.1
Rev: src/symmetric/include/types.h:1.1
Rev: src/symmetric/util.c:1.1
Rev: src/symmetric/util.h:1.1