Before removing callback.
Core task dispatching with queue and task status.
Use callbacks.
Async core.
Clean up.
Rename - clean up.
Fix tests.
Bugs & tests fixed (1 ignored).
Check if status is completed.
Add test to schedule multiple parallel builds.
Create chain builer for operation tasks.
Extract OperationHandlerBase.
Merge pull request #58 from matejonnet/master

Async core scheduler.