change the meaning of the 'text' argument
exists() is a potentially buggy approach because inherits=TRUE by default; check env[[]] instead
move the big chunk of mime to utils.R, and use list() instead of environment
typo
DRY: remove the repeated docs; use @inheritParams instead
roxygenize
mv vignettes from inst/doc to vignettes
bump version; ready for CRAN
wrong version number again in the news