Upgrade "New Feed" page.<br />Upgrade sub menu layout.<br />Add "comments"(mentions) section to profile page.<br />Optimize browse page for mobile view<br />Optimize member signup page for mobile layout.<br />Upgrade Videos module: add thumbnails. support Youtube and Vimeo.<br />Add "Topics" to stories.<br />--<br />Fix bug: can not click some buttons in mobile layout.<br />