small ui change
Merge branch 'master' of https://github.com/g2-aj/cs304 into branch_alshahna
added gui for checking overdue items
fixed check overdue items and fixed clerk manu layout
Merge pull request #49 from g2-aj/branch_alshahna

Branch alshahna
have added a wrapper menu for the branch that invokes submenus
Merge pull request #50 from g2-aj/branch_alshahna

have added a wrapper menu for the branch that invokes submenus
fixed jframe closing -- dispose
Merge pull request #52 from g2-aj/branch_alshahna

fixed jframe closing -- dispose
Merge 1
Merge branch 'master' of https://github.com/g2-aj/cs304 into g3-ks