feat(toast): add mdToast#showSimple shortcut method

closes #833

src/components/toast/toast.js

@@ -50,11 +50,24 @@ function MdToastDirective() {
  * app.controller('MyController', function($scope, $mdToast) {
  *   $scope.openToast = function($event) {
  *     $mdToast.show($mdToast.simple().content('Hello!'));
+ *     // Could also do $mdtoast.showSimple('Hello');
  *   };
  * });
  * </hljs>
  */
 
+/**
+ * @ngdoc method
+ * @name $mdToast#showSimple
+ * 
+ * @description
+ * Convenience method which builds and shows a simple toast.
+ *
+ * @returns {promise} A promise that can be resolved with `$mdToast.hide()` or
+ * rejected with `$mdToast.cancel()`.
+ *
+ */
+
  /**
  * @ngdoc method
  * @name $mdToast#simple

src/core/services/interimElement/interimElement.js

@@ -86,6 +86,8 @@ function InterimElementProvider() {
         optionsFactory: definition.options,
         argOption: definition.argOption
       };
+      if (definition.argOption) {
+      }
       return provider;
     }
 
@@ -147,6 +149,15 @@ function InterimElementProvider() {
           };
         });
 
+        // Create shortcut method for one-linear methods
+        if (definition.argOption) {
+          var methodName = 'show' + name.charAt(0).toUpperCase() + name.slice(1);
+          publicService[methodName] = function(arg) {
+            var config = publicService[name](arg);
+            return publicService.show(config);
+          };
+        }
+
         // eg $mdDialog.alert() will return a new alert preset
         publicService[name] = function(arg) {
           // If argOption is supplied, eg `argOption: 'content'`, then we assume

src/core/services/interimElement/interimElement.spec.js

@@ -157,6 +157,28 @@ describe('$$interimElement service', function() {
       });
     });
 
+    it('should create a shortcut show method with arg options', function() {
+      var shown = false;
+      createInterimProvider('interimTest')
+        .addPreset('banana', {
+          argOption: 'color',
+          methods: ['color'],
+          options: function() {
+            return {
+              onShow: function(scope, el, opts) {
+                shown = true;
+                expect(opts.color).toBe('yellow');
+              }
+            };
+          }
+        });
+      inject(function(interimTest, $rootScope) {
+        interimTest.showBanana('yellow');
+        $rootScope.$apply();
+        expect(shown).toBe(true);
+      });
+    });
+
     it('should show with proper options', function() {
       createInterimProvider('interimTest')
         .setDefaults({