Install redis and memcache php5 extensions. Refs #4
Set default percona passwords to 'password'
Set proper permissions on sources.list files
Remove unused authorization entry from role file
Remove unused directory
Include Postgres support
Mount /vagrant as a directory writeable by the vagrant user:group. Closes #4
Do not attempt to create the directories if index.php exists
Fix apt-get notifications for faster setup
Do not trigger an immediate restart of nginx