login: adds login functionality to the webpage
utils: user annd db utils fixes
database: sql scripts fixes
Changes in user_utils

*Added update function now tested

Conflicts:
	utils/user_utils.php
user_utils: get student info fixes

* Updates header and user utils in order to work after user login.
database: university and department name addition
profile: details of the user using db

* Adds php to the profile html to retrieve the details from the db.

* Redirects user to login page if tries to access profile page without login.
squash
search: browse_list search query execution

* Adds search query to browse list to fetch books from db.