Add post model to rails.
Add post serializer to rails.
Add comments model to rails.
Add comment serializer.
Update gemfile.
Update ember router.
Update ember router.
Copy controllers, models, routes, templates and view from rails-ember-simple-posts.
Update gemfile with active model serializers.
Revert 9d9c9f1..d9bfcc3

This rolls back to commit 9d9c9f190818696d0453f37c1ef0c2512cc247bc.
Revert 52fc60b..5e49e84

This rolls back to commit 52fc60bf64027747354d32d9052e6888a4602889.
Remove ember project due to errors.
Add new ember project.
Basic backend and frontend features working (excluding CRUD operations).