API-docs now open, better organized

We've just removed the password protection from the API-description section. It's been a good six months since the first partner implementation of our API went live. The Popyoular platform is definitely mature enough for us to forget any reservations we had about openly sharing the documentation. We've also take the opportunity to divide what used to be a really long single page into more bite-sized chunks. Clearly an improvement even if it's simple stuff, but look out for a more formal documentation style at a later stage. (Oh, and that 100.000-reviews post is coming, promise - we're at about 90.000 now)