added karma test framework and network skeleton

test/test.network.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var should = chai.should();
+describe('Network service', function() {
+
+  var network;
+  beforeEach(angular.mock.module('cosign'));
+
+  it('should exist', function() {
+    inject(function($injector) {
+      network = $injector.get('network');
+      should.exist(network);
+    });
+  });
+  it('should return 2', function() {
+    network.f().should.equal(2);
+  });
+  it('should', function() {});
+  it('should', function() {});
+
+});