Revert "Revert "Experiment: Adsense.""

We have to go deeper.

This reverts commit a704b9489d3928f8eaf5e0fc1c9b7d8aed36cda3.
Update site.
Try out responsive ads.
Update site.
Verdict is in: no Adsense for the time being.
Update site.
Add details about cable runs.
Update site.