menu bar restrictions working
created a user registration form and corresponding controller. Also fixed a bug with adding a user's password length check.
Cleaned up some code and added proper comments for login and logout controllers. Also updated the README to reflect the changes that we've made to our app.
added back buttons to create/edit user

added back buttons to create/edit user as well as to post create/edit
fixed errors with usermaint and post_admin

can no longer create a duplicate usernamed user
fixed errors when trying to create a user with a username that was already assigned to a user in the db.