added 'prey_escape' back into workflow, imposed random escape direction and rotational speed of escape is now drawn from a normal distribution.
fixed merge issue?
updated foraging to take in either prey or predator parameter structure, added routine swimming of prey. simple_model is now simulating both players.
I've merged the recent big commit with my previous version.

I didn't add any visual system for the prey, it still only responds when predator is within distance threshold. Code is running fine right now.
forgot to commit these files with previous merge, SourceTree was yelling at me.
Added code for the strike.  This includes use of the global variable 'captured', which ends the simulation when true.