First version take from Ikegami-sensei.
Fixed for my environment on GLUI.
Fixed for my environment on Xcode project file.
Fixed bug on canSee() function.
Fixed Boid class for new model
	- use different sight distance/angle on each force.
	- changed method name.
Fixed order of files in project.
	- changed project files.
Implemented model same as mototake.
Fixed bugs and set parameters by mototake.
added comment to send for Ikegami-sensei.
Removed debug statement.
Fixed parameters and initial conditions.
Fixed for changing field size.
Merge commit '2ec369513c01b0fada8fe400459f22341de2f44e'