* [Installation/Cookbook/Nginx] Updated the Ubuntu/Nginx/PHP instructions to increase 'client_max_body_size' in Nginx, 'key_buffer_size' in MySQL, 'upload_max_filesize' and 'post_max_size' in PHP.  Removed the framework.config.php step from configuring Memcache since this is now done in the UI.
[Cleanup] Minor copy tweaks