All changes requested in PR 17f36243bc
### pokedex/main.py -
#### create_parser() -
- Change to langs argument reverting the help message to the original
one but changing the default to 'all'.
#### command_dump() -
- Add check for 'all' langs code instead of in the load.py file.
- Add/fix comments.
---
### pokedex/db/load.py -
#### dump() -
- Remove unneeded check for 'all' langs code since not it is checked in
the main.py file.
- Reword comment of what happens when the 'none' code is passed.
8ad6443a6c