fixed some bugs too

With this *huge* patch I added reCAPTCHA support to phpsqlitecms.
You can edit the reCAPTCHA settings under 'Spam protection' section in
the administration panel.
After adding your site and your secret reCAPTCHA keys, you can select
where do you want to add the reCAPTCHA check, by now you can add it to:
* users login (/cms/)
* users comments on commentable posts
* mail sent through formmailer
It also prevents to randomly add Google's script in the page if it isn't
enabled, so it should be good for the ones who don't want Google in
their way ;)