Fixed index.d.ts to be used as a module

index.d.ts can allow karma-fixture to be imported as a module like so: 
import fixture from 'karma-fixture'

types/karma-fixture/index.d.ts

@@ -1,6 +1,7 @@
 // Type definitions for karma-fixture 0.2.6
 // Project: https://github.com/billtrik/karma-fixture
 // Definitions by: Ezekiel Victor <https://github.com/evictor>
+//                 Afshawn Lotfi <https://github.com/afshawnlotfi>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 
 declare namespace fixture {
@@ -25,3 +26,6 @@ declare namespace fixture {
 
   export function setBase(fixtureBasePath: string): void;
 }
+
+export = fixture;
+export as namespace fixture;