support for php ver 5.4

Hi, this seems to be connected with

htmlspecialchars changed default value for encoding in php 5.4 from
iso-8859-1 to utf-8

and it now uses some kind of utf-8 quotes in the parameters.

Simple quick fix is to use parameters without quotes
{events_print;number=100;categories=24;dateto=now}
instead
{events_print;number="100";categories="24";dateto="now"}

otherwise one needs to fix line 645 in file fsCalendar.php

// Remove " "
preg_match('/^\"(.*)\"$/s', $val, $matches);
if (count($matches) > 0) {
      $val = $matches[1];
}

which fails with php >5.4 to remove the quotes.