More Sales and Orders made
Error message displayed at login if incorrect details entered.
Changed the dialop box in sale to an error panel when the exceeding the
stock limit.
Merge remote-tracking branch 'origin/christine'

Conflicts:
	orders.ser
	sales.ser
	stocks.ser
Fixed issues with Master
StockMainPanelchangesto load and update available stock when allBtn is
clicked
tabbedPane Listeneradded to mainGui to refresh viewAll stock when stock
tab is pressed