Cookbook Inline Examples 2014Q3

 As per Joris's guidance, this PR is only partially completed. I fully intend to add more.   It might be a week or two, possibly more, until i'm finished. 

I'll squash it all into one commit when I think I'm done and ready for final review.  Feel free to make suggestions as I go, but consider it all a draft until I squash.
I personally find it easier to follow in the docs when you put the commented lines (which say what the following line is going to do) just as text between seperate code snippets:

so instead of 
```
    #An if-then on one column:
    df.ix[df.AAA >= 5,'BBB'] = -1; df

    #An if-then with assignment to 2 columns:
    df.ix[df.AAA >= 5,['BBB','CCC']] = 555; df
```
this
```
An if-then on one column:

.. ipython:: python

    df.ix[df.AAA >= 5,'BBB'] = -1; df

An if-then with assignment to 2 columns:

.. ipython:: python

    df.ix[df.AAA >= 5,['BBB','CCC']] = 555; df
```

But it's personal taste, and you should maybe look at the output and see what you think is best (can depend on the case)