Move to development.
tweak homepage.
tweak.
install livereload.
tweak.
a lot of dev tools.
add interesting email feature.
Merge branch 'develop'
Let rails serve static assets.
Merge branch 'hotfix/assets-for-heroku' into develop
specify ruby version.
drop menu.
Add arrow down.
tweak.
change aruru logo
1.add Postgres
2.add gollum
add i18n setting
add wiki CRUD and history function
add devise
add some css on gullom