Distraction-free Mode
1. Added the link for Distraction-free "Couch Mode" in single.php, next to categories group, below the post title
2. Added the template class file, page-read.php (Couch Mode)
3. Deleted the error_log which was pushed to master by mistake :P
Signed-off-by: Anurag Upadhaya <anuragupadhaya@gmail.com>