Fix tasks list issue

Make sure the same view instance is controlled by presenter and shown on the screen
Fix NPE on task details screen

Now it is possible to pass some parameters to any view.
Rename modules
Remove generic module

As all modules depend on the Core there is no need to have another common module.
Just AbstractView was moved to the Core module.
Remove AbstractTaskView
Fix problems with removed generic module
Add section with process definitions
Extend process definition details screen
Refactor view interfaces
Add section with process instances
Add links between views

Process definition details -> Process instances list
Task details -> Process instance details
Fix Abort button behavior

Now the Abort button is not visible if process has already been aborted or completed.
Change appearance of Home screen
- adding filter for distribution wars