* Add getCookie() method to WebRequest as a wrapper for $_COOKIE. Updated all instanc...

* Add getCookie() method to WebRequest as a wrapper for $_COOKIE. Updated all instances of $_COOKIE to use this.
* Switch from running fix_magic_quotes() on $_COOKIE and $_GET/$_POST to running it on $this->cookies and $this->data. Should keep us from interfering with other programs that might do the same (and/or trying to start up a second WebRequest object). This partially fixes bug 11558.
* Todo: Do similar things with $_SERVER/$_ENV and switch to a lazy-load style, rather than on every new WebRequest.