SUpun test github
did the css styling
done some style changes
Merge branch 'SUPUN' of https://github.com/SANHINDA/Group_Project into DLPDS

Conflicts:
	.idea/workspace.xml
	Public/HTML/addSale - Cashier.html
	Public/HTML/addSale - Stock Keeper .html
	Public/HTML/cashier.html
	Public/JS/Kushan.js
	Public/JS/book.php
	Public/PHP/editbook.php
	Public/PHP/skFlow.php
	Public/PHP_CLASSES/StockKeeperClass.php