FLOE-173: Added a Preview of the authored content

A preview link has been added to the metadata demo which takes you to a page containing the rendered output of the authored content. Also refactored markupViewer.js to pull out the common pieces of code into markup.js
FLOE-173: corrected the markup for the markup view

Added <code> inside of the <pre> to improve the semantics of the markup.
FLOE-173: added controls to the video
FLOE-173: correcting copyrights
Merge remote-tracking branch 'justin/FLOE-173'

* justin/FLOE-173:
  FLOE-173: correcting copyrights
  FLOE-173: added controls to the video
  FLOE-173: corrected the markup for the markup view
  FLOE-173: Added a Preview of the authored content
Merge branch 'master' into FLOE-116