Document/utilize \doi{} markup in revtex4-1

[augustfly]

Apparently deep in the bowels of revtex4-1 there is a \doi{<var>} command definition that automatically takes the target text <var>, rewrites it as doi:<var>, and anchor links it to http://dx.doi.org/<var>. We should do something with this, including documenting it.

[augustfly]

which we should rewrite to always use the correct Crossref display requirement:

\doi{10.5281/zenodo.831784}
=> https://doi.org/10.5281/zenodo.831784

where as the default revtex4-1 style uses the old DOI formatting

\doi{10.5281/zenodo.831784}
=> doi:10.5281/zenodo.831784