Added base definition interfaces
Added dependency with Doctrine Collections
Added states with descriptions to Activity and Definition interfaces
Restructured interfaces for activities and transitions, added descriptions and improved definitions interfaces
Implemented abstract workflow definition
Added interface to basic represent current workflow state
Added PHPUnit to composer dev dependencies and updated related files
Restructured and refactored existing process definition interfaces
Initialized process instances interfaces
Initialized WorkList specify interfaces
Added state methods to process and activity instance interfaces
Moved and refactored WorkListItem to WorkItem