note 60686 added to function.round

Since PHP no longer does Banker's Rounding, I came up with an implementation here: http://boonedocks.net/mike/archives/106-Bankers-Rounding-for-PHP.html It hasn't really been hammered on, so testing and comments are welcome. ---- Manual Page -- http://www.php.net/manual/en/function.round.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+60686 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+60686&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+60686&report=yes Search -- http://master.php.net/manage/user-notes.php