Merge pull request #7 from conclarke/master

Code as submitted for first sprint
Merge pull request #8 from conclarke/master

Full screen
Merge pull request #9 from conclarke/master

Highlighting invalid fields and skip login class
Merge pull request #10 from conclarke/master

Commenting complete for GUI classes
Merge pull request #11 from conclarke/master

Javadocs
Added User Guide
Merge pull request #1 from DITgroup2/master

pull for John's fork
test
test
sabees changes of Account class
Merge pull request #12 from joohnok/master

sabees account class
remove PurchaseOrder class
change Order class;
added OrderDB class
removed SupplyOrder class
add OrderDB
Merge pull request #13 from joohnok/master

Sabees update OrderDB, Order and removed (CustomerOrder and SupplierOrder)
Merge pull request #1 from DITgroup2/master

update by john ok
Merge pull request #2 from DITgroup2/master

test
Merge pull request #14 from hufi/master

Merge pull request #1 from DITgroup2/master
Merge pull request #15 from joohnok/master

Merge pull request #2 from DITgroup2/master
Merge pull request #2 from DITgroup2/master

test sabee