Add interfaces for Directive scope and Component bindings

Interfaces for scope property in Directive and bindings property in Component to avoid using simple Object (not descriptive enough) and the explicit type {[binding: string]: string} which is too verbose.

angularjs/angular.d.ts

@@ -1725,7 +1725,7 @@ declare namespace angular {
          * Define DOM attribute binding to component properties. Component properties are always bound to the component
          * controller and not to the scope.
          */
-        bindings?: {[binding: string]: string};
+        bindings?: IComponentBindings;
         /**
          * Whether transclusion is enabled. Enabled by default.
          */
@@ -1738,6 +1738,10 @@ declare namespace angular {
          */
         require?: {[controller: string]: string};
     }
+    
+    interface IComponentBindings {
+		[binding: string]: string;
+	}
 
     interface IComponentTemplateFn {
         ( $element?: JQuery, $attrs?: IAttributes ): string;
@@ -1826,6 +1830,10 @@ declare namespace angular {
             transclude: ITranscludeFunction
         ): void | IDirectivePrePost;
     }
+    
+    interface IDirectiveScope {
+		[property: string]: string;
+	}
 
     interface IDirective {
         compile?: IDirectiveCompileFn;
@@ -1848,7 +1856,7 @@ declare namespace angular {
         replace?: boolean;
         require?: string | string[] | {[controller: string]: string};
         restrict?: string;
-        scope?: boolean | Object;
+        scope?: boolean | IDirectiveScope;
         template?: string | Function;
         templateNamespace?: string;
         templateUrl?: string | Function;