Implemented UserDetailsService
Added reference to User to OfferDiscussionPost
Changed Spring Security authentication properties
Added Post Author to offerDiscussion view
Merge branch 'master' into feature/displaying-username

Conflicts:
	src/main/java/com/io/traderbook/controller/OffersController.java
After merge fix
Merge pull request #1 from Desmond14/feature/displaying-username

Displaying post author's nick. Closes #22