Fixed a wrong event name
Added feature to emit events in the future using the event loop
Added command to clear the cache
Updated the dependencies
Changed source code format
Removed underscore from all protected method
More code formatting changes
Make sure the size in freeMemory() is positive
Added a check in the REST server test if inserted objects can be retrieved from the database
Set the Memory Helper through DI
Changed the order of the static keyword
Added visibility for __construct()
Merge branch 'feature/psr-2' into develop

Conflicts:
	Classes/DataAccess/Reader.php
	Classes/Memory/Helper.php
	Tests/Unit/Server/RestServerTest.php
Cleaned up 'else if' statements after PSR-2 reformatting
Merge remote-tracking branch 'origin/develop' into develop