Merge pull request #10 from DavidePastore/single-ip-usage-documentation

Add documentation about single IP usage

README.md

@@ -80,7 +80,8 @@ You can restrict route using a different value of `ip` in the `options` given to
 * any of the filters provided by PHP regarding `FILTER_VALIDATE_IP` (e.g.: `FILTER_FLAG_NO_PRIV_RANGE`);
 * asterisk (`*`) to filter ip that are in the given subnet (e.g.: `192.*`);
 * ranges (`-`) to filter ip that are in the given range (e.g.: `192.168.0.0-192.168.255.255`);
-* array of ranges to filter ip (e.g.: `array('192.0.0.0-192.255.255.255', '178.0.0.*')`);
+* single ip (e.g.: `192.168.0.1-192.168.0.1`);
+* array of ranges to filter ip (e.g.: `array('192.0.0.0-192.255.255.255', '178.0.0.*')`).
 
 You can find more syntax information on the `Ip` validator [documentation](https://github.com/Respect/Validation/blob/master/docs/Ip.md) and in its [Unit Test class](https://github.com/Respect/Validation/blob/master/tests/unit/Rules/IpTest.php).