Bundle angular templates for app

We were already bundling angular templates for node tests; this commit
reuses the same setup to include them in the app; this means any
new-style template (those under js folder) will be included in angular's
template cache when the app loads, thereby skipping the ajax request for
that template. Huzzah!

awx/ui/static/js/app.js

@@ -86,6 +86,7 @@ var tower = angular.module('Tower', [
     dashboard.name,
     moment.name,
     templateUrl.name,
+    'templates',
     'AuthService',
     'Utilities',
     'LicenseHelper',

awx/ui/static/js/shared/icon/icon.directive.js

@@ -1,15 +1,22 @@
 export default
     [   'templateUrl',
-        function(templateUrl) {
+        '$rootScope',
+        function(templateUrl, $rootScope) {
             return {
                 restrict: 'E',
                 templateUrl: templateUrl('shared/icon/icon'),
                 scope: {
                 },
                 link: function(scope, element, attrs) {
+
+                    function buildSvgs() {
                         var svg = $('svg', element);
                         var iconPath = '#' + attrs.name;
 
+                        if ($(iconPath).length === 0) {
+                          return;
+                        }
+
                         // Make a copy of the <symbol> tag to insert its contents into this
                         // element's svg tag
                         var content = $(iconPath).clone();
@@ -25,6 +32,13 @@ export default
                         svg[0].setAttribute('viewBox', viewBox);
                         svg.attr('class', classes)
                             .html(content.contents());
+                    }
+
+                    $rootScope.$on('include-svg.svg-ready', function() {
+                        buildSvgs();
+                    });
+
+                    buildSvgs();
 
                 }
             };

awx/ui/static/js/shared/icon/include-svg.directive.js

@@ -1,4 +1,4 @@
-export default ['$http', function($http) {
+export default ['$http', '$rootScope', function($http, $rootScope) {
     return {
         restrict: 'E',
         link: function(scope, element, attrs) {
@@ -6,6 +6,7 @@ export default ['$http', function($http) {
 
             $http.get(path).then(function(response) {
                 element.append(response.data);
+                $rootScope.$emit('include-svg.svg-ready');
             });
         }
     };