Update Gruntfile
(wip) add spec test for drone communication
Add drone address to Box model
Add lodash (used in tests)
(wip) add class for drone communication
(wip 2) add class for drone communication
Update Grunt tasks
Fix spec tests for Drone communication

- (wip) there is still tests to implement
- Fix Box and Sector spec tests to include `bin/www`
Implement Drone communication service
Write spec tests to mark boxes as avaiable or not

- Test for Boxes in database also
Set Boxes as avaiable or occupied

- Fix some testes
Merge branch 'drone-communication'

- resolve #8
- resolve #9