Comment model additions

Adding comments (not working at the moment)


~~I need help, because I have an error that I can't figure out. I'm working on the view/controller for the path `http://localhost:3000/comments/new`, but right now there is an error that says~~
```
undefined method `comments_path' for #<#<Class:0xbb4a004>:0xbb49aa0>
```
~~I don't understand the error because I don't use the term `comments_path` anywhere in my code..... please help~~

EDIT - fixed that problem