Format a bytecount and make it human readable

 Format::Human::Bytes is used to convert bytecount values to human-readable
 strings. It will return you a printable string which is more readable by
 humans than a simple bytecount.
 .
 For example:
    use Format::Human::Bytes;
    $readable = Format::Human::Bytes::base2($bytecount[,$decimals]);
 It will convert in base 2 format.
 .
    $readable = Format::Human::Bytes::base10($bytecount[,$decimals]);
 It will convert in base 10 format.
 .
 Another way is to create constructor for example:
 .
    $fhb = Format::Human::Bytes->new();
    $readable = $fhb->base2($bytecount[,$decimals]);
    $readable = $fhb->base10($bytecount[,$decimals]);