Observation column named Value

[canwaf]

Right now we prevent the creation of qubes from pivoted csv which has a column called value, and we check columns before we pivot for such names.

But in standard shape we accept the name value, but inspect will fail because we check for the column name before we pivot.

We should just say no. No columns called values from the word go.

(And fix the docs as the link to the docs don't work.)

https://gss-cogs.github.io/csvcubed-docs/external/guides/errors/inspect-command-errors/invalid-obs-val-col-entitled-value/ resolves from http://purl.org/csv-cubed/err/obs-val-col-entitled-value