Renamed route and action for retrieving one sound
Refactored test case, renamed according to route that is tested, added test for creating a sound route
Added test for getting non-existant sound
Fulfilling test case for getting non-existant sound
Added test and implementation for Sound factory
POST /api/sounds now working, tests green
Made Sound repository a service
Renamed SoundBundle to DomainBundle
Added test case for POST /api/sounds/:id when setting location