Closes issue #10 and #11
Create Offer Entity
Create Offer Entity, OfferRepository, OfferRepositoryTest
Create Offer Entity, OfferRepository, OfferRepositoryTest
Create Offer Entity, OfferRepository, OfferRepositoryTest
Merge branch 'master' into dev-issue-#8

Conflicts:
	src/test/java/com/bargainhunter/bargainhunterws/repository/StoreRepositoryTests.java
Resolves conflict with master.