Merge pull request #8 from g2-aj/branch_alshahna

Branch alshahna
Merge branch 'master' into branch_lin
add show book
Merge pull request #9 from g2-aj/branch_alshahna

started checkOutItems transaction within clerk
Merge pull request #10 from g2-aj/branch_lin

Branch lin
edited insertBorrowingTuple to take in the respective callNumber and the respective copyNo from the BookCopy table