SecureMode tutorial
Merge pull request #712 from kholia/SecureMode-tutorial

SecureMode tutorial
Do not print candidates in status lines when in secure mode.
Closes #713 although we could improve this by printing the
"components" just like in a crack, eg:
`1g 0:00:00:00 DONE 2/3 (2014-08-12 21:46) 100.0g/s 101200p/s 101200c/s 101200C/s L6-?d..L6-?l`
For Bitcoin format, use JtR's SSE variant of SHA-512 instead of the ossl one for an almost 2x speed improvement. Also a small speed boost to the non-SSE variant by avoiding EVP_BytesToKey().
Merge pull request #715 from gurnec/bleeding-jumbo

For Bitcoin format, use JtR's SSE variant of SHA-512 instead of the ossl one