Updates in this commit:
*Added feature to add notes on users.
*Added feature to show users.
*Added base skeleton for profiles on users, although not used for anything yet. (Cant be updated...)
*Renamed datafile to dev_db, since I plan to keep it as a dev db mostly for doing dev, and having a small data set that contains everything needed to toy with all the features.
*Renamed BlockedUsers to BlockedUser to be in line with the naming of all other models.
*Renamed app to job_app in loop in the show_applications_for_jobs view.