make it possible to toggle between technical and layperson displays

[potterzot]

It would be nice to have a small switch at the top of the page allowing the user to toggle between technical and layperson displays. Differences would include:
1- graph (produced in R) would have different units and labels. Units would be driving equivalents (miles driven per 100sq. feet cleared), which would be calculated by applying a simple conversion factor prior to final calculated values prior to plotting (for now, [value in CO2-eq]*1.86, but @teixeirak needs to verify).
2- The .csv for download would only show up on the technical display.
3- The users guide (.pdf) to which the "guide" link directs would differ.

I'd appreciate other suggestions from a layperson's perspective!

[dlebauer]

If doing conversions please use a library. In R convertr is a good one that has no dependencies but if udunits is already a dependency it is worth using that library or perhaps https://rubygems.org/gems/numru-units/versions/1.9.0

[jaydorsey]

@dlebauer This will be handled on the R side of things. @potterzot has already done at least some of the work on it.