Localize cleanup and de_DE update

+ Fixed inventory names of SpawnMeter and Quern
All pottery items are in the creative tab now
Fixed inventory unknown grass blocks.

Inventory item grass block rendering also works.
Creating a meal prep area now requires a bowl in your inventory along with the knife. Also added Help instructions on the knife.
Instructions for casting liquid metal now only shows up for metals that can actually be cast.
Cleanup and tooltip fixes.
Merge pull request #114 from emris/LocalizeCleanup

Localize cleanup and de_DE update
Merge pull request #115 from emris/PotteryCreativeFix

All pottery items are in the creative tab now
Merge pull request #116 from emris/UnknownBlocksFix

Fixed inventory unknown grass blocks.
Fixed rendered items sinking into the block below.