Added customer class
Merge branch 'master' into darren
Create README.md

Instructions to install and use git.
Testing String name commit
New Supplier class
Added shop main class
Merge branch 'master' into darren
Merge branch 'master' into darren
Created class structures
Added Sale and Order Classes
Removed unnecessary comments
Shop GUI Basic
Shop GUI Basic
Merge branch 'niall'
Shop Basic Menu Working
Nicer login to main menu
Nicer shop gui
Order and Sale classes complete
8 buttons on main menu
Invoice and Order tests done