Hide creeper from frontend, prevent addition of creeper ammo via ammo scheme
This is a temporary measure because the creeper is still very unfinished.
This can be reverted when the creeper is finished.
foreach(dir
Art
Bamboo
Bath
Beach
Blox
Brick
Cake
Cave
Castle
Cheese
Christmas
City
Compost
CrazyMission
Deepspace
Desert
EarthRise
Eyes
Freeway
Fruit
Golf
Halloween
Hell
Hoggywood
Island
Jungle
Nature
Olympics
Planes
Sheep
Snow
Stage
Underwater
)
add_subdirectory(${dir})
endforeach(dir)