login

rough functionality of login good to go, merged with bootstrap no problem.  being logged in doesn't actually do anything except tell you that you're logged in, and you can create the same username as many times as you want.  

based on what I saw in the Blogger tutorial, it doesn't look like it will be too hard to add some protection features to the login, but i figured it would make sense to wait until we had some things to protect against: user carts, admin screens...