Removed Nostalgia(US+EU), added Primed(EU)

A lot of people requested this in Mumble today because now they have what they want: A server dedicated to TNT maps.

This PR does:
-Removes US and EU Nostalgia
-Adds EU Primed (see #146)

Maps that won't be in the rotations anymore:
-A Watery Grave
-Race for Victory
-Cake Wars
-Shroom Trip
-Avalanche