remove now superfluous experimental file
reformat post_index_route.js
add function destroy to post_index_controller
add delete link to post_index template
clean up post_index_controller
create category_index_controller
add delete link to category_index template
add column approved to comments table
migrate DB
adapt the comment model, the comment serializer and the ember comment model to new attribute approved
change post_index template so only approved comments are displayed
add buttons for (dis)approving comments to comment_in_list template
add "approved: true" to comments in seeds.rb
create comment_controller