Solved a problem with queries
JSON problem fixed
Variables name
Add comment
Format
Merge branch 'back-end' of
https://github.com/smartcampuslab/smartcampus.openservices into back-end

Conflicts:
	src/main/java/eu/trentorise/smartcampus/openservices/controllers/HomeController.java
Merge branch 'back-end' of https://github.com/smartcampuslab/smartcampus.openservices.git into back-end