parallel_tools.py: Remove idea about map_async(). Tried it, wasn't great. - Tried map(), actually, and the resulting code wasn't much simpler.
parallel_tools.py: Remove idea about map_async(). Tried it, wasn't great.
- Tried map(), actually, and the resulting code wasn't much simpler.

makrutenko/dunovo,makrutenko/dunovo,makrutenko/dunovo