hmm...i also noticed the lack of tutorials when i was trying to learn this...ill probably make one at some point just for consistency's sake...
but at the most basic level you need a control_point_master_entity and a few control_point_round entities, one for every round you want
those should sort out the rounds but you need more functionality then that, id advise you look at a decompiled map
EDIT:
...how did you find that darker...i scoured that site looking for some sort of guide...