Add introduction markdown vignette draft
Add categorical conversion
Complete single group summary
Complete with export and miscellaneous
Add info necessary to include vignettes to the package
Bump version to 0.6.3 in DESCRIPTION
Update NEWS file
Reformat headers in .Rmd
Update Makefile to check for updates in vignettes
Update files ginored in building
Add automatically generated docs and passing check result file
Merge branch 'feature-markdown-vignette' into develop