use rails g command to generate basic files for plugins
add plugin manager page and seeds
add yield for :scripts
plugins 开启和关闭功能
add field 'link' to table plugins
add entry for carousel plugin
generate Carousel uploader
using rais g command to generate Carousel
add bootstrap png
finnaly makes upload & destroy work
add carsouel display partial for visitor index
display carousel when the plugin is enable
ignore upload
add condition of render carousel if carousel exists
add rspec for plugins
add selenium-webdriver
plugin test
ignore javascript test
add fonts
add before send to verify csrf token