Add GMP, KRB5 and yasm to Travis "build bot" config.
Try to not DOS the Travis build hosts %-)
Add a check for BIO functions in crypto lib.
Merge pull request #615 from frank-dittrich/bleeding-jumbo

Fix AES-NI support for 32 bit Linux builds
Format django-scrypt: report tunable costs N, r, p
Log tunable costs even if they don't differ among salts