TODO
- fix bugs reported through http://pear.php.net/bugs/ (373, 512)
- think about custom runtime tag loading (Stan Lemon was busy with this)
- make sure <li> is embedded in <ul> of <ol>
- add a nl2br option
- maybe add default value for attributes (target in url)
- try to fix recursive lists (only occurs with [*] shorthand)
- make it possible to use spaces in argument values with quotes

DONE
- fix urls with strange characters (#, &, spaces)
- add more advanced text filter (color, size, quote, code, etc)
- check for notice errors (undefined offset)
- fixed bugs 484, 486, 518, 508, 462