Fix Advanced Containerization Using DataLad tutorial

[asmacdo]

The upstream tutorial is broken, which we've copied here.

ReproNim/containers#135

When that issue is fixed, lets update this tutorial to match.

[chaselgrove]

The EAB will be more concerned about the general site structure than the details of the commands, so this doesn't need to be fixed before the meeting. Marking Phase 2.

[memartone]

I would like a more informative title that expresses the aim of the tutorial in terms of the principles if possible. What is someone trying to achieve with this rather than the tools that it is trying to teach. @asmacdo or @chaselgrove

[asmacdo]

Tutorial was changed in a separate PR to "Advanced Containerization Using DataLad" so rename is no longer a part of this issue.