TerraFirmaThings

Some cool tweaks as suggested by folks!

Major tweaks:

-Shift right clicking a rope ladder with an empty hand at the top or the bottom of the ladder will let you instantly pick the whole thing up.

-Placing a block on top of a gem display will change its model to remove the stone walls that overlap with the placed block. This lets you do things like placing a glass block on top of the display to give you a perfect glass gem case!

Mini tweaks:

-Changed bear traps, grindstones, and snares to pop off when the block below them is removed.

-Lowered grindstone base stack size from 64 down to 4.

-Allowed basic whetstones to be placed on tool racks.