Create user registration service. TODO: FIX THE RESPONSE.
Fixed: register endpoint response.
Some model changes.
Added CRUD methods for user entity.
Using JSON to Object mapping with jackson-jersey.
Added validation for entity User.
Fixed models; Added Hibernate Search
Created some new REST endpoints
Merge branch 'master' of https://github.com/obshtestvo/what-should-i-do

Conflicts:
	rest/pom.xml
	rest/src/main/java/bg/obshtestvo/model/User.java