Export main 2 functions from gh + Use in index

Also reformatted gh

src/index.ts

@@ -1,8 +1,10 @@
 import { Greeter } from './greeter';
+// tslint:disable-next-line:ordered-imports
+import { fetchUnusedForkedRepos, runMain } from './gh';
 export * from './greeter';
 
 // tslint:disable-next-line:only-arrow-functions
-(function(currentWindow: Window) {
+(function (currentWindow: Window) {
   // execute when load index.js
 
   // tslint:disable-next-line:no-console
@@ -11,6 +13,7 @@ export * from './greeter';
   // assign Greeter to global
   const myWindow = currentWindow as any;
   myWindow.Greeter = Greeter;
+  myWindow.runMain = runMain;
   // we can use Greeter , execute following in console
   // var greet = new Greeter('myName');
   // greet.greet();