Create "Author" instead of "Editor" descriptions general and sch intros

[grenerad]

While the introductions to individual novels will be headed by "Lead editor" tags (as they are now), we will probably want to have "Authors" on the General Introduction and Scholarly Introduction (rather than Lead editor). This looks to be something imported

[csbailey5t]

Unneeded for now given presence of clear how-to-cite blocks on pages.