Restore Buy bitcoin page and add buy.bitcoin.com as a service there

src/js/services/buydotbitcoindotcomService.js

@@ -0,0 +1,24 @@
+'use strict';
+
+angular.module('copayApp.services').factory('buydotbitcoindotcomService', function($http, $log, $window, $filter, platformInfo, storageService, buyAndSellService, lodash, configService, txFormatService) {
+  var root = {};
+  var credentials = {};
+  var isCordova = platformInfo.isCordova;
+
+  root.init = function(cb) {
+
+  };
+
+  var register = function() {
+
+      buyAndSellService.register({
+        name: 'buydotbitcoindotcom',
+        logo: 'img/bitcoin-com-logo.png',
+        location: 'Buy Bitcoin With Credit Card',
+        sref: 'tabs.buyandsell.bitcoindotcom'
+      });
+  };
+
+  register();
+  return root;
+});