Find compatible secure hash algorithm

[ri0t]

One that is available on javascript as well. Python's passlib should support most secure, current hash functions.

Up until now (for prototyping purposes), we were still using md5 - and didn't even salt it - yuck!

[ri0t]

I'd say blake2:

• Javascript: https://github.com/dchest/blake2s-js
• Python 2: https://pypi.python.org/pypi/pyblake2/0.9.3
• Python 3: Integrated in new hashlib

(Caution: blake2s is optimized for 8-32-bit, whereas blake2b is optimized for 64 bit)

Oh, FWIW, it is also available with ZMQ, via libsodium.

[ri0t]

This one goes hand in hand with #197

[ri0t]

After discussion with @MichaelKreil, i decided to skip that. Since #201 is fixed - USE SSL!!

For internal database hashing, we now use sha512 (available on py 2.x as well)