Cleaned up useless tiling on ctf2

Removed a nosense winter_dark block
cleaned up and updated doodads for 0.7

changed the old 0.6 tiles doodads to the new ones.
updated year
deleted some hidden background tiles

minor fix.
Added 1st stage of sur1

I'm currently reworking kukurice to get it into the official line up,
just added here as reminder.
not finished yet