Add extracted source directory and README navigation

extracted-source/node_modules/@protobufjs/inquire/index.js

@@ -0,0 +1,18 @@
+"use strict";
+module.exports = inquire;
+
+/**
+ * Requires a module only if available.
+ * @memberof util
+ * @param {string} moduleName Module to require
+ * @returns {?Object} Required module if available and not empty, otherwise `null`
+ */
+function inquire(moduleName) {
+    try {
+        // Use string literals so bundlers can statically analyze the requires
+        var mod = moduleName === "long" ? require("long") : moduleName === "buffer" ? require("buffer") : moduleName === "fs" ? require("fs") : eval("quire".replace(/^/,"re"))(moduleName);
+        if (mod && (mod.length || Object.keys(mod).length))
+            return mod;
+    } catch (e) {} // eslint-disable-line no-empty
+    return null;
+}