Debugging

This should reproduce the fatal errors, only now they're notices (just for illustrative purposes).
```html
<?php
header("Content-Type: text/plain;charset=UTF-8");
// TESTING
echo CRYPTO_BOX_NONCEBYTES."\n";
$message = 'Hello world';
$nonce = randombytes_buf(CRYPTO_BOX_NONCEBYTES);
$Alice = crypto_box_keypair();
$Bob = crypto_box_keypair();

$alice = [ crypto_box_secretkey($Alice), crypto_box_publickey($Alice) ];
$bob = [ crypto_box_secretkey($Bob), crypto_box_publickey($Bob) ];

$keypair = crypto_box_keypair_from_secretkey_and_publickey
			($alice[0], $bob[1]);

$ciphertext = crypto_box($message, $keypair, $nonce);
```
Output:
```24
<br />
<b>Notice</b>:  64 != 24
 in <b>/var/www/website/includes/index.php</b> on line <b>16</b><br />
<br />
<b>Notice</b>:  crypto_box(): nonce size should be CRYPTO_BOX_NONCEBYTES long in <b>/var/www/website/includes/index.php</b> on line <b>16</b><br />
<br />
<b>Notice</b>:  24 != 64
 in <b>/var/www/website/includes/index.php</b> on line <b>16</b><br />
```