Better documentation of twitter functions in users.php
largo_fb_url_to_username and a goal for largo_fb_user_is_followable
Facebook now follows people instead of subscribing to them
Facebook username and followability functions and tests
Updates author bio social links for changes to Facebook username storage
Removing unnecessary p tags

The error message inclues an opening and closing p by default
Unsetting $result
Merge pull request #310 from INN/improved-facebook-function

Facebook username and followability validation for #271