- add --version, -V
- do we want rsync -H by default?

- update documentation:
   - german doc?
   - exit pre/post exec -> error codes (after implementation!) (in 0.4)
   - write about fast changing fs
- write mkccollectconfig (for 0.5!)
   o create source configuration
   o another script for changing defaults
      x intervalls
      x pre-/post exec
   o (X)dialog based