Add content weight to drug furniture.
Make item weights apply to all the furniture dragging calculations.
Cap the move penalty that we'll assess for heavy furniture, refuse to move it instead.
Warn more often when dragging furniture is being really slow.
Fixed Wandering Turrets: The Roam-ening!

Modulo was incorrect and resulted in a slight offset when the position of the coordinate component was negative.
New modulo uses the fixed semantic of % operator in C++11.
Warn upon saving a tutorial that the world is weird.
Add capital letters for zones and autopickup keybindings.
Merge branch 'zones-apu-keybindings-fix' of https://github.com/OzoneH3/Cataclysm-DDA into merge
Merge branch 'warn-upon-saving-a-tutorial' of https://github.com/BevapDin/Cataclysm-DDA into merge
Merge branch 'fix-monster-moving-when-they-should-not' of https://github.com/BevapDin/Cataclysm-DDA into merge
Merge branch 'drag-cost-for-items-in-furniture' of https://github.com/kevingranade/Cataclysm-DDA into merge