Create User RESTful Web Service that response on JSON.
Create JSONBuilder class that serialize classes to JSONOblects.
Add Jersey and Gson jar's.
Update Model classes.
Update DAO's, DAO transformers and Model classes.
Create User setter class, update Models, DAO's and Transformers.
Create GenericService and UserService interfaces, UserServiceImpl with 
createItem implementation.
mergin branches
Merge branch 'chemodurov' into webservice

Conflicts:
	BuyIt/WebApp/WEB-INF/web.xml
	BuyIt/build/classes/com/epam/lab/buyit/model/Product.class
	BuyIt/src/main/java/com/epam/lab/buyit/model/Product.java

Update UserWebService, JSONBuilder, implement getItemById 
in UserServiceImpl, create UserSerializationAdapter
Create UserSerializationAdapter
Implement ContactDAO, UserDAO, AddressDAO getAllItems methods.
Update JSONBuilder with list serialization method. Update UserWebService
with get all users method.
Create UserListSerializationAdapter
Add UserListSerializaationAdapter
AJAX login verification
Implement UserDAO getUser by login and password and verifyLogin.
Create CheckLoginServlet and login-check.js
Update registration.jsp
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Change SearchServlet, add search service interface and implementation of
this service. Change web.xml add mapping for searchResult.jsp
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