Second playtest version of Rivet, an arena map

|fixed BLU spawning with RED
|fixed some minor texture stuff
|fixed soundscapes not playing
|fixed leak
|fixed soundscapes not playing

+added signage
+added cover to lower route
+added generator to side route
+added lights
+added info_observer_point
+added markers for capture zone

+increased capture zone
+increased length of a wall in the side route



Please give feedback!