Display uploaded media

Summary:
* Make sure uploadIDs are converted into CDN urls and displayed
* Changed type of uploadID's to strings, as numbers are

Reviewed By: priteshrnandgaonkar

Differential Revision: D18762974

fbshipit-source-id: d94af61b0bc114b5f0cc2bfcde98fd491058e971

src/fb-stubs/user.tsx

@@ -11,7 +11,7 @@ export function getUser() {
   return Promise.reject();
 }
 
-export async function internGraphAPIRequest(
+export async function internGraphPOSTAPIRequest(
   endpoint: string,
   formFields: {
     [key: string]: any;