added uniform graph code, for SIR model
added barabasi albert model to graphs, under construction
added __init__.py
finished BA graph generator, needs testing
finished BA graph generator, needs testing; cleaned print statements
added examples for cascade models
changing to branch master
merged master into branch
comitting before pull
BA generator now takes seed graphs using optional argument seed_graph, finished BA_cascade example
changed graphs directory to graph_generators
commented all the code
commented all the code
fixed variable names, added more comments, cleaned up old commented code
commented the graphism/examples code
added modular cascade example
added tp and rp change to BA cascade
minor changes
Merge branch 'graph_generators' of github.com:akellehe/graphism into graph_generators
small changes to BA_cascade and SI_model