fix camelcase type definitions

camelcase/camelcase-tests.ts

@@ -1,6 +1,6 @@
 /// <reference path="./camelcase.d.ts" />
 
-import camelCase from 'camelcase';
+import camelCase = require('camelcase');
 
 camelCase('foo-bar');
 camelCase('foo_bar');

camelcase/camelcase.d.ts

@@ -4,5 +4,7 @@
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 declare module "camelcase" {
-	export default function camelcase(...args: string[]): string;
+	function camelcase(...args: string[]): string;
+	namespace camelcase {}
+	export = camelcase;
 }