Add an apache style directory browser

Check if a directory exists in FileService
Add directory_browser.mustache
Add DirectoryViewer
Add test files in resources
Rename localFileResponse to localFileSystemResponse
Testing

It looks like this:

![screen shot 2014-10-18 at 6 39 11 pm](https://cloud.githubusercontent.com/assets/1482532/4692329/366dbe2c-575c-11e4-91ef-3ca0608fb41c.png)