In-browser SaltyCrypto hello-world

This is a small "hello-world" program to show that the SaltyCrypto module loads and runs in a browser.

The BLAKE2s hash of the empty input is 69217a3079908094e11121d042354a7c1f55b6482ca1a51e1b250dfd1ed0eef9

The SaltyCrypto module computes it as: Huh, no answer from the code! Broken somehow I guess?

You can play with the module via the SaltyCrypto global variable in the JavaScript console.