adjust tools
The tool values were really messed up. This corrects:
- Tools get different fleshy damage (for example the sword cause more damage than the shovel to monsters).
- All Mithrils tools get maxlevel=3 (uses for level 3 200, but for level 2 now 3*200=600 instead of 300 (except for pick, which stays with the higher uses)).
- The insane small punch interval is corrected to the upstream value.
- Swords can now cut all snappy nodes (as it is normal for default tools).