Begin implement EmailJob class. See #31
Implement gearman worker. See #43
Add check class on exists.
Add TestController for manual testing.
Add/changed serialize data in gearman classes.
Fix default action in worker controller
Add server/port to config.
Add getJobName static method to JobInterface. Implement it in Job classes.
Add check worker state
Add server settings in config for QueueWorker
Throw exception, when servers are not set in config.
Remove flush which throw exception.
Minor codestyle fixes
Fix codestyle
Merge pull request #74 from aivus/worker

Implement GearmanWorker and EmailJob