Linh Tran HW7 submission

I hate git :(
Also, I am able to make the 4 requirements work, with also:
+Change the admin index to say 'Categories' instead of 'Categorys'.
+Add columns for the date fields to the list display of Posts.
+Display the created and modified dates for your posts when viewing them in the admin.

I am still working on this:
-Add a column to the list display of Posts that shows the author. For more fun, make this a link that takes you to the admin page for that user.
-For the biggest challenge, look into admin actions and add an action to the Post admin that allows you to bulk publish posts from the Post list display