* Get rid of the bootstraplib option and simply use bootstraplib when a theme is active
* Restore previous bootstraplib theme when exiting a file/dir based runApp
* wip use latest htmltools+bootstraplib to sketch out local theme API
* Don't do anything with bootstraplib's global state and make sure bs_theme is an expected value
* typo
* better docs
* bugfix
* Use the new, more general, tagFunction() instead
* Set the theme object as a part of the page layout (instead of in shinyApp())
* rollback the structural changes to selectizeIt() to avoid breaking code that makes assumptions about the return value of selectInput()
* set shinyOption() in bootstrapLib(), not bootstrapPage()
* Add a helper for checking whether theme is a bs_theme
* Make theme a required arg in bootstrapSass
* Have bootstrapLib() call shinyOption() at render-time, and document why it works
* Have bootstrapPage() always place bootstrapLib(theme) at the top of the tagList()
* Only set shinyOption() when an application is running at render-time (otherwise; throw a warning)
* code review
* Export a new getCurrentTheme() for Shiny developers to access the theme's Sass code
* bump version
* More themable sliderInput()
* Slider's accent color default should derive from primary theme color
* Remove custom theming args (skin, accentColor, sassVars) but still support theming via bootstraplib
* Wrap sass compilation into reusable function
* remove check warning
* Make font-family configurable; auto-contrast fromto handle text color; increase color contrasting (for accessbility)
* Sync up with other PRs
* Sync up DESCRIPTION
* Forgot to update CSS output file logic
* document
* code review
