update version number
Add Changelog file
fix handling of SHA-384 and SHA-512 signatures

now they will be assigned 192 bit and 256 bit security margin instead
of the conservative value of 0
make red actually useful

since many sites still use SHA-1 signatures, this is more than
likely the weakest link for them, this makes it hard to distinguish
from sites that use known broken crypto, like very short RSA keys
or RC4
clean up leftover debug variable (removes "undefined" from CN)
add estimate for 512 bit RSA and DSA
Merge remote-tracking branch 'origin/master'