use upstream chainpad.js

www/common/chainpad.js

@@ -558,7 +558,7 @@ var Common = require('./Common');
 var Operation = module.exports.Operation = require('./Operation');
 var Patch = require('./Patch');
 var Message = require('./Message');
-var Sha = require('./SHA256');
+var Sha = module.exports.Sha = require('./SHA256');
 
 var ChainPad = {};
 
@@ -574,7 +574,9 @@ var enterChainPad = function (realtime, func) {
 };
 
 var debug = function (realtime, msg) {
-    console.log("[" + realtime.userName + "]  " + msg);
+    if (realtime.logLevel > 0) {
+        console.log("[" + realtime.userName + "]  " + msg);
+    }
 };
 
 var schedule = function (realtime, func, timeout) {
@@ -707,12 +709,16 @@ var onPong = function (realtime, msg) {
 
 var create = ChainPad.create = function (userName, authToken, channelId, initialState, config) {
 
+    config = config || {};
+
     var realtime = {
         type: 'ChainPad',
 
         authDoc: '',
 
-        config: config || {},
+        config: config,
+
+        logLevel: typeof(config.logLevel) !== 'undefined'? config.logLevel: 1,
 
         userName: userName,
         authToken: authToken,