Surf: New maps!

Surf map additions and related server updates.

Easy Surf

• surf_pantheon - T1 L 3B
• surf_prelude_ksf - T1 L

Hard Surf

• surf_grassland - T2 L
• surf_newbie - T2 4S B3
• surf_sandtrap2 - T2 L 4B
• surf_slob - T2 7S 1B
• surf_squirrelsonvacation - T2 L B1
• surf_volvic - T2 L 2B
• surf_666 - T6 6S 6B

Original changelog