SOme Changes product
Merge branch 'master' of https://github.com/pmh92/ServiceTechnologies1

Conflicts:
	src/it/polimi/st1/models/Product.java
Merge branch 'master' of https://github.com/pmh92/ServiceTechnologies1

Conflicts:
	src/it/polimi/st1/client/services/product/ProductService.java
	src/it/polimi/st1/client/services/product/ProductServiceAsync.java
	src/it/polimi/st1/models/Product.java
	src/it/polimi/st1/server/services/ProductServiceImpl.java