Enabled image display for products
restore default no-image display
added official default image thumbnail
Fixed a small bug in display of product thumbnails
Fixed the bug in the Toaster class
Fixed the bug on products disappearing
Fixed image display bug
Merge remote-tracking branch 'origin/master' into tmp-master

Conflicts:
	src/main/java/ca/mcgill/cs/creco/logic/ConcreteServiceFacade.java
	src/main/java/ca/mcgill/cs/creco/web/model/ProductView.java