Stubbed runtime and app.runtime in caterpillar.js. Resolves #8.

src/caterpillar.py

 #!/usr/bin/env python2
 # -*- coding: utf-8 -*-
 
 # Copyright 2015 Google Inc. All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #     http://www.apache.org/licenses/LICENSE-2.0
@@ skipping 79 matching lines @@
 /**
  * @const An array of filenames of cached files.
  */
 var CACHED_FILES = [
   {joined_filepaths}
 ];
 
 importScripts('{boilerplate_dir}/caterpillar.js');
 importScripts('{boilerplate_dir}/sw_static.js');
 
-// Ignore calls to chrome.app.runtime.onLaunched.addListener from the background
-// scripts.
-chrome.app = {{
-  runtime: {{
-    onLaunched: {{
-      addListener: function() {{}}
-    }}
-  }}
-}};
-
 // TODO: (Caterpillar) Edit background scripts to remove chrome.app.runtime
 // dependence.
 """
 
 
 def setup_output_dir(input_dir, output_dir, boilerplate_dir, force=False):
   """Sets up the output web app directory tree.
 
   Copies all files from the input Chrome App to the output web app, and creates
   a subdirectory for the boilerplate code.
@@ skipping 604 matching lines @@
   if args.mode == 'config':
     configuration.generate_and_save(args.output, args.interactive)
 
   elif args.mode == 'convert':
     config = configuration.load(args.config)
     convert_app(args.input, args.output, config, args.force)
 
 
 if __name__ == '__main__':
   sys.exit(main())