upgraded jwcrypto and start mixing in server-side entropy

package.json

@@ -18,7 +18,7 @@
         "express": "2.5.0",
         "iconv": "1.1.3",
         "mustache": "0.3.1-dev",
-        "jwcrypto": "0.2.2",
+        "jwcrypto": "0.3.1",
         "mysql": "0.9.5",
         "node-gettext": "0.1.1",
         "node-statsd": "https://github.com/downloads/lloyd/node-statsd/0509f85.tgz",

resources/static/common/js/network.js

@@ -6,7 +6,8 @@
 BrowserID.Network = (function() {
   "use strict";
 
-  var bid = BrowserID,
+  var jwcrypto = require("./lib/jwcrypto"),
+      bid = BrowserID,
       complete = bid.Helpers.complete,
       context,
       server_time,
@@ -45,10 +46,7 @@ BrowserID.Network = (function() {
     setUserID(result.userid);
 
     // seed the PRNG
-    // FIXME: properly abstract this out, probably by exposing a jwcrypto
-    // interface for randomness
-    // require("./libs/all").sjcl.random.addEntropy(result.random_seed);
-    // FIXME: this wasn't doing anything for real, so commenting this out for now
+    jwcrypto.addEntropy(result.random_seed);
   }
 
   function withContext(cb, onFailure) {