users can only edit and delete their own recipes
only authenticated users can add recipes
test for recipe display time now includes signed in user
Comment authentication and feature spec renaming.

- Users can only edit and delete their own comments.
- Unauthenticated users cannot add comments.
- Also, rename feature spec files to make user role clear.
edit routes: tag index is now specific to user
remove bottom navigation from some views
Authorization and user-specific index pages for tags.

- Tags display on the correct user's index page.
- Users can add, edit, and delete tags on their own tags page only.
unauthorized user cannot add, delete, or edit tags
add recipe index pages for individual users