web/boids.js: Increase max boids count
web/boids.js: Put Bird structure in Boids namespace
web/boids.js: Rename ctx -> context
web/boids.js: Declare classes first
web/boids.js: Small refactors
web/boids.js: Rename conf -> config
web/boids.js: Refactor configuration settings
web/boids.js: Refactor the context