Beta PHP.net: updated goals and to-do items

Dear list, I have updated https://wiki.php.net/web/redesign and https://wiki.php.net/web/redesign/howtohelp to reflect some of the work that has been done and some things that still need to be done on the beta PHP.net. I ask that anyone who has a spare moment to review the current php.net and the prototype and try to identify any major problems, such as missing content, and add it to the howtohelp page. I also ask that if you work on anything that is not bug-related (such as the fixed-menu hiding things) that you email this list so we can all be aware what people are working on. Cheers from your Unofficial Project Lead, Levi Morrison