Update MorePyMC.ipynb

Probably a type since the code uses `N_B = 750`
Merge pull request #135 from hackaugusto/patch-1

Update MorePyMC.ipynb
Histogram was not visible due to incorrect ylims.
Merge pull request #136 from michaf/master

Histogram was not visible due to incorrect ylims.
some formatting issues
I found some typo in Chapter2_MorePyMC/MorePyMC.ipynb.

1. In the section [A and B Together],
   "$\text{delta}=0$ =0$" should be "$\text{delta}=0$"

2. In the section [Initializing Stochastic variables],
  "where 0, 4 are the DiscreteUniform-specific upper and lower"
   should be "where 0, 4 are the DiscreteUniform specific lower and upper"

3. In the section [Normal distributions],
   "$\sigma^{2}$ instead of $\tau$" should be "$\sigma^{2}$ instead of $\tau^{-1}$
Merge pull request #138 from Youki/pull_request

I found some typo in Chapter2_MorePyMC/MorePyMC.ipynb.
recieved -> received
Merge pull request #141 from Bulwersator/master

recieved -> received
trying to remove usage of mc inplace of pm
Merge branch 'master' of github.com:CamDavidsonPilon/Probabilistic-Programming-and-Bayesian-Methods-for-Hackers
removing image
typos in CH2
import pymc as mc -> pm in chapter 3 + typos
typos chapter 4
Minor typo correction
Fix typo
Minor change to phrasing
Fix spelling typo
Merge pull request #149 from williamscott/master

Minor editing changes on Chapter 2