Development (again) continued:

Development (again) continued:
- New interface 'HandleableChunks introduced
- Task for chunk assembler/handler added, still some required methods are not
  yet added (unfinished)
- Changed interfaces in some setter to more generic to allow more object
  instances being set (which are still fine)
- Moved initialization of e.g. network package instance in task classes to
  factory method to speed-up things in executeTask() method
- TODOs.txt updated