Add partial view

Adding partial views to the comment view and form view
Remove comment functionality

Now you can remove comments. If you delete a post, the comments will
also be removed from the database.
Add Authentication/Authorization

Adding auth to website...sent over plaintext.............
Add tags

Adding tags produced a security error. not sure if the tutorial is wrong
or if I made a typo. But it seems like rails is saving me from a
security risk if the tutorial is wrong