Merge pull request #80 from xcthulhu/master

requirements.txt
forget to pull first
Merge branch 'master' of github.com:CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers
fixing some issues
Update README.md
Update README.md
Update README.md
Update README.md
Update README.md
adding first draft of pdf
Merge branch 'master' of github.com:CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers
Update README.md
Gathering data from Chandra
Merge branch 'master' of git://github.com/CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers