Revert to depending on our own data
Namespace call to content
Bump dev version number
Delete data and documentation for it
Depend on genderdata package
Merge branch 'feature/depend-on-data-package' into develop
Remove image from README
Suggest magrittr to avoid note in check
Document certainty argument to avoid warning
Load data to avoid warning about unexported datasets

CRAN, all data sets in a package's data/ directory are exported, so why
are you warning me that they are unexported?

This fix comes with a heavy performance penalty
Try to reduce data loading time
Merge branch 'feature/pass-check' into develop