Merge pull request #143 from Evgenus/master

Fix optional 'output' argument.
Fix typo in README

getPublicKeyFingerPrint -> getPublicKeyFingerprint
Merge pull request #148 from felixhammerl/master

Fix typo in README.
Use Math.ceil() when getting # of bytes from bits.
Always prepend zeros to random to fill up to modulus size.
Release 0.6.12.
Start 0.6.13.
Remove unused var.
Increase test timeout to 5 minutes.
Update README.md

fix error in PKCS12 examples
Merge pull request #153 from UkuLoskit/master

Fix typo in README.md for PKCS12.