Documentation and pkgdown fix

[billdenney]

No functional changes

[billdenney]

@mattfidler, I got things farther, but there seems to be something like a crash here. Can you diagnose that?

[mattfidler]

It isn't a crash per-se it a difference in how evaluate behaves with the new version. I simply need to completely rewrite et() or take out the examples. It consistently hangs when generating these examples though they run interactively just fine.

[mattfidler]

They also run just fine in Rmarkdown alone...

[mattfidler]

I think this is an error in evaluation in either pkgdown or evaluate. Ignoring these works just fine.