confusing translations

[PBarmby]

In my experience, 2 major sources of confusion for users of other languages are

• row versus column order for matrices/arrays
• 0-indexing versus 1-indexing

So it would be good to discuss these at some point (possibly in the pandas section?)

[tomhohenstein]

@PBarmby - I think your second bullet point is well taken. I did find a quick reference to zero indexing on line 287 in _episodes/01-basics.md.

Locations are numbered from 0 rather than 1.

Maybe we could add a little more information there and then expand in another section