change sequence of events and use only asynchronous HTTP requests

...sentation/2.0/acornmediaplayer/jquery.acornmediaplayer.js

...nmediaplayer/themes/bigbluebutton/acorn.bigbluebutton.css

...presentation/playback/presentation/2.0/css/foundation.css

...k/presentation/playback/presentation/2.0/lib/bbblogger.js

...ion/playback/presentation/2.0/lib/popcorn-complete.min.js

...ck/presentation/playback/presentation/2.0/lib/spin.min.js

...ack/presentation/playback/presentation/2.0/lib/writing.js

...yback/presentation/playback/presentation/2.0/playback.css

...back/presentation/playback/presentation/2.0/playback.html

...ayback/presentation/playback/presentation/2.0/playback.js