arena_clocktower a4

-Removed spawn doors
-Setup time decreased
-Respawn room gets disabled after setup
-Smoothing clipping near the train gates
-Fixed some long sightlines
-Added cover along the bridge
-Changed pickup positions

-Fixed HDR issue
-Fixed player_destruction hud from showing
-Added a small underground area under cp house
-Some texture details
-Opened the area around the house
-Removed the famous bridge
-Smooth clipping

-Added a func_respawnroom
-Widen more the mid section
-Fixed logic bugs
-Changed clocktower position.
-Opened more ways to go around the mid section
-Func_breakable? what is it?
-Nature & Wildlife preservation measures
-Some very small details
-Increased skybox height