Suppress old save terrain loading messages
Suppress missing scenario message from saves before scenarios existed
Stop vehicles that are off from generating noise and smoke
Stop blacklisted hardcoded items from spawning
Fix blacklist checking
Add plate helmet to no medieval mod
Price fix.

A sewage sample should not be worth five dollars.
Merge branch 'Old-save-fix' of https://github.com/i2amroy/Cataclysm-DDA into mergethisone
Merge branch 'Hardcoded' of https://github.com/i2amroy/Cataclysm-DDA into mergethisone
Merge branch 'Noiseandsmoke' of https://github.com/i2amroy/Cataclysm-DDA into mergethisone
Merge branch 'sewage-fix' of https://github.com/Rivet-the-Zombie/Cataclysm-DDA into mergethisone