fixed two minor grammar errors and a python typo
Added two missing words
Merge pull request #168 from mdiephuis/master

fixed two minor grammar errors and a python typo
Typos and one edit for style.
Merge pull request #170 from mdiephuis/master

Typos and one edit for style.
Adding sentence on Fisher information
Merge branch 'master' of git://github.com/CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers