clean up article
minor updates
fix uuids
minor updates
minor updates
minor updates
minor updates
update content
use travis ci according to https://help.github.com/articles/troubleshooting-github-pages-build-failures#configuring-a-third-party-service-to-display-jekyll-build-error-messages
update content about execjs issue
minor update
change permalink style
redirects
redirect gem
redirects
add 404 page
add 404 page
use shortid in permalink
redirects and permalinks oh my
rename image directory