* rewrite intro
* fix incorrect values and descriptions
* consolidate Header Set and Body Set columns to Header Only
* resolves #1 indicate implied values separated from default values
* clarify difference between effective value and implied value
* update description of fields
* adjust column widths
* add several missing attributes
* move any above empty in legend for document attributes table
* remove outdated footnote and fix references to the remaining one
* rename Values column to Allowable Values
* rename Header Only column for security attributes to CLI/API only
* configure content in table header to align to bottom