added backend to fix freezing of animation
changed variable names of list 'boid_data'
changed var names within update_boids: x/y_positions/velocies
added config file with number of points in boids
restructured initial condition loading, using config
added more update_boids config constants
added plot boids config
changed iteration structure to parallel iteration, adjusted regression test accordingly
simplified iterative addition = --> +=
introduced distance variable
created explicit flocking coeff variable
added speed differenc, made new test, because iteration loop changed structure (speed diff stays constant until the end of each iteration)
added speed coefficient, renamed distance thresholds
improved comments