add tests for WebRTC and fix some mocha browser test problems

from now on you need to run "grunt shell --target=dev" to build the test
version of copay which you can run the mocha browser tests on, which includes
packages like sinon and soop.

package.json

@@ -52,7 +52,6 @@
     "mocha": "1.18.2",
     "mocha-lcov-reporter": "0.0.1",
     "node-cryptojs-aes": "0.4.0",
-    "sinon": "1.9.1",
     "soop": "0.1.5",
     "travis-cov": "0.2.5",
     "uglifyify": "1.2.3"
@@ -60,6 +59,7 @@
   "dependencies": {
     "mocha": "^1.18.2",
     "mocha-lcov-reporter": "0.0.1",
-    "preconditions": "^1.0.7"
+    "preconditions": "^1.0.7",
+    "sinon": "1.9.1"
   }
 }

test/index.html

@@ -15,6 +15,7 @@
     <script src="../lib/bitcore/browser/bundle.js"></script> 
     <script src="../js/copayBundle.js"></script>
     <script src="test.blockchain.Insight.js"></script>
+    <script src="test.network.WebRTC.js"></script>
     <script src="test.PrivateKey.js"></script>
     <script src="test.PublicKeyRing.js"></script>
     <script src="test.storage.LocalEncrypted.js"></script>

test/test.network.WebRTC.js

@@ -0,0 +1,38 @@
+'use strict';
+
+var chai           = chai || require('chai');
+var should         = chai.should();
+var expect         = chai.expect;
+var sinon          = sinon || require('sinon');
+var bitcore        = bitcore || require('bitcore');
+var copay          = copay || require('../copay');
+var Network        = copay.WebRTC || require('../js/models/network/WebRTC.js');
+
+describe('Network / WebRTC', function() {
+
+  it('should create an instance', function () {
+    var n = new Network();
+    should.exist(n);
+  });
+
+/*
+  describe('#Network constructor', function() {
+    it('should call cleanUp', function() {
+      var save = Network.prototype.cleanUp;
+      Network.prototype.cleanUp = sinon.spy();
+      var n = new Network();
+      n.cleanUp.calledOnce.should.equal(true);
+      Network.prototype.cleanUp = save;
+    });
+  });
+
+  describe('#cleanUp', function() {
+    it('should set privkey to null', function() {
+      var n = new Network();
+      n.cleanUp();
+      expect(n.privkey).to.equal(null);
+    });
+  });
+  */
+
+});