optimizations
module1, application q1
clean up
add generate_random_graph(...)
add normalize_in_degree_dist(...)
add compute_out_degrees(...)
module 1 app q2 - implement draw_plot(...)
clean up, bug fix
add DPATrail class as a helper
rename... doh
implement module 1 app q3
implement dpa_graph(...)
formatting
implement q4/q5
add images for module 1 assignment
data for module 1 application part