Changable hasher

[fmkra]

• Merge blake2s and keccak versions into one branch
• Add bash scripts for changing between versions

To change version run either blake.sh or keccak.sh. By default keccak is active.

[Okm165]

@fmkra pls check if os selection scripts work for u

[fmkra]

@fmkra pls check if os selection scripts work for u

Works great

[Okm165]

One minor issue persists when using keccak.sh with the native Keccak implementation: it repeatedly adds comment symbols indefinitely to the parts related to Blake2s (this renders blake2s section not changeable with blake2s.sh), and vice versa.
Hash sections itself have some comments
Do we merge it? It works if u use it correctly

[fmkra]

Decided to ditch bash and created a python script which is much better and allows for easier expandability in the future (if we wanted to add other hashers)

[Okm165]

LGTM!!!