Add Support for PBKDF2

[bekwam]

The current version only allows for simple password SHA-256 hashes. First add support for SHA-512 hashes.

Extend this to allow for salted password hashes implemented with PBKDF2 SHA-256 and SHA-512.

This will require an additional "salt" field to be returned from the Users Query.

[CarletonWalker]

Implemented the following simple (no salt hashes)

• SHA_256
• SHA_384
• SHA_512
• SHA3_224
• SHA3_256
• SHA3_384
• SHA3_512