#28: add form, view, template for adding new post
#28: add is_approved field to Post model, migrate it
 #28: add is_approved filter to querysets
 #28: add post
#28: add waiting_room
 #28: show posts in waiting room
 #28: remove unwanted picture during adding post
clean & clear space -> tab in templates
 #25: remove dim.html, gem.html, create dimgem.html