meta tag update to helper
pluginCSS deprecated
client scripts replaced with nodebb.min.js
new require.js paths
cleanup
upload_picture_modal.tpl
copyright no longer required on themes
changes to user object in category view
changes to pinned / locked icon in category view
category_name is now name
category_id is now cid
topic_id is now tid and topic_name is now title

why isn't topic_name = name, like in category view? @barisusakli
motd is now a widget
deprecated no_topics_message