Add extracted source directory and README navigation

extracted-source/node_modules/node-forge/lib/md.all.js

@@ -0,0 +1,13 @@
+/**
+ * Node.js module for all known Forge message digests.
+ *
+ * @author Dave Longley
+ *
+ * Copyright 2011-2017 Digital Bazaar, Inc.
+ */
+module.exports = require('./md');
+
+require('./md5');
+require('./sha1');
+require('./sha256');
+require('./sha512');