add 'activity_status', 'activities', 'user_activities' to 'setup/db.sql'
add 'models/activities.js', 'models/activity_status.js', 'models/user_activities.js'
update 'models/activities.js', 'models/activity-status.js' and 'setup/db.sql'
Merge branch 'master' of https://github.com/node-fun/siyuan
update 'models/activities.js' and 'setup/db.sql'
Merge branch 'master' of https://github.com/node-fun/siyuan