Include instructions for updating css-zero

[dailson-igo]

Maybe... For beginners to understand how to update easily.

$ gem update css-zero

Note that any customizations to the css-zero files and application.html.erb will be lost after running the commands below

$ bin/rails generate css_zero:install -f

If you included all the components, run the command below. Otherwise, include only the components you used and add "-f" at the end

$ bin/rails generate css_zero:add accordion alert autoanimate autosave avatar badge breadcrumb button card carousel chart check_all combobox command collapsible datepicker dialog dropdown flash form fullscreen group hotkey input input_concerns inputmask layouts lightbox local_time navigation pagination progress prose sheet skeleton sortable switch table tabs trix upload_preview toggle web_share -f