[wip] adding message signing functionality

Problem is this:

    Uncaught ReferenceError: require is not defined
        <anonymous> moz-extension://b4685fc7-232c-44d9-b653-f51b7c7ea868/dist/jex_include/local-vdk_aecrypt-0.1.0/dist/jex_include/local-blakejs-1.2.1/dist/index.js:1
    index.js:1:13

The issue is that blakejs is written for node and needs to be modified to work
in a browser.

Next task is doing that, but did a ton of work so taking a break

libs/blakejs/jex_mindist/dist/index.js

@@ -0,0 +1,15 @@
+const b2b = require('./blake2b')
+const b2s = require('./blake2s')
+
+module.exports = {
+  blake2b: b2b.blake2b,
+  blake2bHex: b2b.blake2bHex,
+  blake2bInit: b2b.blake2bInit,
+  blake2bUpdate: b2b.blake2bUpdate,
+  blake2bFinal: b2b.blake2bFinal,
+  blake2s: b2s.blake2s,
+  blake2sHex: b2s.blake2sHex,
+  blake2sInit: b2s.blake2sInit,
+  blake2sUpdate: b2s.blake2sUpdate,
+  blake2sFinal: b2s.blake2sFinal
+}