Small changes acces to webtools.php from another IP than 127.0.0.1

1) after we enable webtools, we have access only from 127.0.0.1, but when I worked from localhost my nginx configuration sets like ```listen 192.168.1.5:80;``` and I have not access to webtools.php
I think that it`s better to have webtools.config.php that allow access to webtools.php from another IP adress

here is my small changes
```
cat webtools.config.php
<?php
define('PTOOLSPATH', '/var/www/phal.i.i/private/vendor/phalcon/devtools');
/* you can set ADMINIP as IP 192.168.0.1 or SUBNET 192. or 10.0.2. or 86.84.124. */
define('ADMINIP', '192.168.');
```
```
$ cat webtools.php 
require 'webtools.config.php';
require PTOOLSPATH.'/scripts/Phalcon/Web/Tools.php';

Phalcon\Web\Tools::main(PTOOLSPATH,ADMINIP);
```

2) second commit unseriosly - I do`nt wont to see error messages on Scaffold pfges about Undifined index in array? just added one string