Move the web service related classes to different package
added availableItems

Still trying to get currentOffers working...
Merge branch 'master' of https://github.com/david-tam-bjss/ShopBkt

Conflicts:
	src/main/java/DavidTam/BasketCalculatorWebService.java
	src/main/java/DavidTam/HelloWorldWebService.java
	src/main/java/DavidTam/webService/BasketCalculatorWebService.java
	src/main/java/DavidTam/webService/HelloWorldWebService.java
	src/main/java/webService/BasketCalculatorWebService.java
	src/main/java/webService/HelloWorldWebService.java
	src/test/java/DavidTam/JerseyClientTest.java
	src/test/java/DavidTam/webService/JerseyClientTest.java
	src/test/java/webService/JerseyClientTest.java