Complete refactoring of the original Picocrypt into a modular architecture.

TESTING IS WELCOME!

The refactoring code can be found in the code-refactor branch.

GNU/Linux:
sha256(Picocrypt-NG) d5d2082b60127e448d135fa9f49b3f29a288281e39b922482bb6ae24e7ca157d
sha256(Picocrypt-NG.deb) 3fbe913c045654ba3fbc5504934a84068354b1794b02531011727b9053b7a865

macOS:
sha256(Picocrypt-NG.dmg) c76090f4bd75ef7c9e0634581ef09022bc5b94105e9d14c12f137c0c05815326

Windows:
sha256(Picocrypt-NG.exe) E407E70898B0EBAD6AFCF2608B9C55B71A709E795AE5C43C4B6EFDC71FF6E2E8