Better shopping cart movenent. It will now be dragged behind the player.

TODO: Check if this works with bigger vehicles as well.
First pass.
Water purification tablets!

Rather rare and incredibly valuable!
Production methods.
More production.
Charcoal water purifier.
Item spawns.
Recipe diversification.
Better recipe.
Changed quantity.

Enough to clean one gallon.
Plus nothing holds five units of water.
Adding matches to recipe.
Adjusted rarity.
Altered charcoal purifier efficiency.
First pass.
Recipe update to glass.
Fix'd.

I hope!
Third time's the charm!
Char creation: Profession scrollbar fix.
Add an information message when you start studying a book to tell you how to stop. Addresses #1505.
Fix'd!