* Add option to use bootstraplib and have selectInput() theming variables
* Use getShinyOption()
* Have useBsTheme() error out with informative messages if a theme isn't active
* Better Sass variables defaults that account for both bootswatch themes and bs_theme_base_colors()
* Add Carson as an author
* Provide better BS3/BS4 selectize sass variable defaults as a patch to the source files
* tidy up tools script
* add sass to suggests
* yarn install && yarn build
* Wrap sass compilation into reusable function
* Bring -color-item closer to -color-input
* Leverage the new sass::output_file()
* naming change
* Sync up with other PRs
* Sync up DESCRIPTION
* Forgot to update CSS output file logic
* document
