Merge pull request #57 from g2-aj/branch_kris

Solved the multiple printout bug, added check if the book is already ret...
pay fines and view outstanding fines gui added, need to fix array bug
manual merge update
Merge pull request #58 from g2-aj/branch_alshahna

pay fines and view outstanding fines gui added, need to fix array bug
Merge branch 'master' of https://github.com/g2-aj/cs304 into branch_kris