Rename varr_types to just varr

This reworks VarType to be just Varr. That sarrt o' stomps on a built-in
name, but it's shorterr and seems to make more sense documentation-wise.

Furtherr, this tweaks some o' th' code to handle otherr Vars betterr.
Tweak lint output to betterr do errorsonly

This removes th' last vestiges o' warnin' matarrial from th' errorsonly
output.