4 bits icons count bug

Hello!

The script doesn't manage the 4 bits icons correctly.

My version of the bug fix:

Change lines 361-364 form:

$color = array(
'High' => bindec(substr(decbin(ord($color)), 0, 4)),
'Low' => bindec(substr(decbin(ord($color)), 4))
);

To:

$color = array(
'High' => ord($color) >> 4,
'Low' => ord($color) & 0x0F
);

Or here is another way to fix this bug, using string functions like the original script:

$color = array(
'High' => bindec(substr(str_pad(decbin(ord($t_c)), 8, "0", STR_PAD_LEFT), 0, 4)),
'Low' => bindec(substr(str_pad(decbin(ord($t_c)), 8, "0", STR_PAD_LEFT), 4))
);

But I think the use of bitwise operators is quicker than calling 5 different functions to get the nibble value.