Updated new-groups / group-plans static page #8674 (#8729)

* dummy

* Renamed internationalized strings to more meaningful names

* moved the new group creation state out to its own URL, so it can also be linked to by the static/plans page

* Added redirect-through-login functionality from the static/plans page new-group button
This includes a static non-modal login page (similar to how other sites have both a login page and login modal)
The login body has been abstracted out from its modal-specific view into mixins to accomplish this

* deleted bak files added by mistake

* deleted scripts added by mistake

* changed static/plans Create Group button text

* Added form link (https://github.com/HabitRPG/habitica/issues/8674#issuecomment-303518039)
Removed changes to non-EN locale files (https://github.com/HabitRPG/habitica/pull/8729#issuecomment-303555211)

* reverted key name changes as per https://github.com/HabitRPG/habitica/pull/8729#issuecomment-304515534

* changed $rootScope to $scope
https://github.com/HabitRPG/habitica/pull/8729#discussion_r120695874

website/client-old/js/controllers/newGroupCtrl.js

@@ -0,0 +1,53 @@
+"use strict";
+
+/*
+ A controller to manage the New Group page
+ */
+
+angular.module('habitrpg')
+  .controller("NewGroupCtrl", ['$scope', '$window', 'Groups', 'Payments',
+    function ($scope, $window, Groups, Payments) {
+      $scope.PAGES = {
+        CREATE_GROUP: 'create-group',
+        UPGRADE_GROUP: 'upgrade-group',
+      };
+      $scope.activePage = $scope.PAGES.CREATE_GROUP;
+      $scope.changePage = function (page) {
+        $scope.activePage = page;
+        $window.scrollTo(0, 0);
+      };
+
+      $scope.newGroup = {
+        type: 'guild',
+        privacy: 'private',
+      };
+      $scope.PAYMENTS = {
+        AMAZON: 'amazon',
+        STRIPE: 'stripe',
+      };
+
+      $scope.newGroupIsReady = function () {
+        return !!$scope.newGroup.name;
+      };
+
+      $scope.createGroup = function () {
+        $scope.changePage($scope.PAGES.UPGRADE_GROUP);
+      };
+
+      $scope.upgradeGroup = function (paymentType) {
+        var subscriptionKey = 'group_monthly'; // @TODO: Get from content API?
+        if (paymentType === $scope.PAYMENTS.STRIPE) Payments.showStripe({
+          subscription: subscriptionKey,
+          coupon: null,
+          groupToCreate: $scope.newGroup
+        });
+        if (paymentType === $scope.PAYMENTS.AMAZON) Payments.amazonPayments.init({
+          type: 'subscription',
+          subscription: subscriptionKey,
+          coupon: null,
+          groupToCreate: $scope.newGroup
+        });
+      };
+    }]);
+
+