Adding note for nginx users to block directories.

Currently, I am using apache's .htaccess files to block some very
important directories in case someone decides to use this app in the web
root (which I highly discourage). That way, these secure directories (the
ones that hold configuration information about the blog and user) are
still not available. If you're using nginx, please make sure you block
these directories as well. At the very least, please block the [blogs]
directory as it houses the most important configuration.