Librarian!

login.php
> Added mysql_real_escape_string to prevent SQL Injections
mimes.php
> Modified for .csv file upload
librarian.php
> Added claim_return function for Claim/Return Functionality
reference_material.sql
> Added new attribute named total_in_stock defining the number of stock
available within the library. Different from total_stock, which is the
actual stock regardless if borrowed or inside the library, and
total_available, which is used for reserves.

Pending:
> Updating transactions table on claim/return
> Possible view for the list of unaccomplished transactions.