added test for bids.
Merge branch 'facelets' of https://github.com/chip2n/dat076-wannabe-blocket into facelets

Conflicts:
	src/test/java/com/wannabeblocket/model/ModelTest.java
Added interfaces to model classes.
Merge branch 'facelets' of https://github.com/chip2n/dat076-wannabe-blocket into facelets