Small cleanup items.

This PR contains a few small cleanup items: 

1. The Warden recipe included modifying the configuration file. The needed configuration is now in `custom_config_files/warden/warden/test_vm.yml`, so this part of the recipe is no longer needed. 

2. Added some newline characters to the output of the sample Sinatra app so this ouput doesn't get lost with the console prompt. 

3. Added a `manifest.yml` file to the sample Sinatra app to reduce the prompting on push. 

4 Updated the output at the end of the `rake cf:bootstrap` task.