LB-1392: Implement wrappup-toggle plugin

Done
LB-1425: Add requirejs plugin for css

(temporary) always load css on the browser
LB-1392: Implement wrappup-toggle plugin

'Ported' the stt theme to the new system
Merge branch 'master-wrapup-toggle' of https://github.com/vladnicoara/plugin-liveblog-embed-server into master-wrapup-toggle