Add separate control for changing hedgehog tags

Rename AFK Mode to “Auto Skip” (bug #78)

Rewrite introduction in README

Update README about the team chat key

Underwater theme: Replace SD flakes with bloodred jellyfish and change SD background color Also fix clipping problem of normal flakes

Fix preview image for Sticks map

Redo SD water and SD clouds of most themes and apply sd-tint

Make team chat its own control and use [U] key by default Why [U] and not [Y]? Because [Y] is already occupied by Confirm.

Show remaining ammo when using Birdy egg or RC Plane bomb

Mutant: Force special mutant/feeder hat+name to be only hold by those who deserved it Previously, a player could just name their hog "Mutant" and give it the respective hat to try to confuse other players. This is no longer possible.