major refactoring of the css into separate scss files, which can then be compiled into larger css files
use these new css files for the styling
remove the get_shiny_css function, as for shiny, ssz_page or add_zcss_deps should be used
zuericssstyle 0.1.0
add ssz_page and add_zcss_deps functions; the first to directly create a fluid page with SSZ styling, the latter to add the styling to any other kind of html/ui
create examples for all widgets under inst/examples
remove sszActionButtonIcon, as we did not use an action button with an icon and it anyway did not work properly