Add some detail to control complexes.

mapgen.lua

nodes.lua

textures/loud_walking_alien_floor.png

textures/loud_walking_control_floor.png

textures/loud_walking_control_floor_alert.png

textures/loud_walking_control_wall.png

textures/loud_walking_strange_growth.png

textures/loud_walking_strange_plant_1.png

textures/loud_walking_strange_plant_2.png