For tweets, just use Recent Tweets plugin supported by the theme – have to provide lot more information though than the old JTWT one. See more details with step by step instructions here –
https://www.livemeshthemes.com/support/faqs/twitter-widget-api-v1-1-configuration/
Also, check at the end of this post for alternative to Photostream plugin –
https://www.livemeshthemes.com/support/forums/topic/brankic-photosteam-breaking-html5-markup/