Collection of minor changes

-agents and predator must have clear line of sight for detection
-random input added to agent behavior
-nearest agent angle and direction added to agent behavior
-changed colors
-predator body changes red when agent is sighted
-fixed bugged hash map display for predator
-renamed behavior files
-removed junk from multi_agent and multi_agent_no_gfx
-added high speed mode for visual output, but not limited by the
simulation time steps