Genderize method
Bump version and dependencies
Genderize takes multiple names
Pass genderize method on to sub function
Requiring magrittr breaks all tests
Warn if genderize method uses years
Basic tests for genderize
Fix problems with importing packages
Convert generize values to our format
Documentation for genderize method
Fix import problems
Genderize respects certainty argument
Merge branch 'feature/genderize' into develop
Fix underscores in names
Depend on babynames package instead of ssa_national

And thus depend on tidyr
Bump R version number
Namespace call to content
Works with babynames package instead of ssa_national
Remove mention of data from vignette
Removed calls to ssa_national in vignette