Work in progress.

Finished:
 -Article html no longer goes over javascript bridge.
 -Articles, images, css and js files loading/displaying properly.
 -Single query article download - the reason is it is tricker
  to be splitting lead/non-lead section retrieval across 2
  requests and also if the point of this refactor is to
  streamline away low-performance javascript, it seems
  antithetical to be amending/injecting late arriving
  non-lead section html via javascript. Additionally,
  now that we're using gzip encoding properly the download
  is much smaller than it was when we first split the
  request in 2.

Not yet finished:
 -Javascript css transforms.

Change-Id: Ie5aa09d7ac36f06930ac1bfbe09c0259240253fe