Update readme to init the submodule.

diff --git a/README.md b/README.md
index deb92560157f3152239a5f5a1a3deb6389407dc6..be342060d71f44f83655df8f35ba901b60915485 100644 (file)
--- a/README.md
+++ b/README.md
@@ -45,6 +45,8 @@ To get a local copy of the current code, clone it using git:
 
     $ git clone git://github.com/mozilla/pdf.js.git pdfjs
     $ cd pdfjs
+    $ git submodule init
+    $ git submodule update
 
 Next, you need to start a local web server as some browsers don't allow opening
 PDF files for a file:// url: