Only render 404 for single-object model based pages per #857.
Round resize calculations up, close #862.
pa should handle activity from plugins
Disable turbolinks from screens#index to screens#show as a workaround for #848.
only include key if available
only catch MissingTemplate exceptions
Merge pull request #863 from concerto/accommodate_pa_from_plugins

pa should handle activity from plugins
add hook for content overriding
Merge branch 'refs/heads/master' into travis_dbs

* refs/heads/master:
  add hook for content overriding
  only catch MissingTemplate exceptions
  only include key if available
  Disable turbolinks from screens#index to screens#show as a workaround for #848.
  pa should handle activity from plugins
  Round resize calculations up, close #862.
  Only render 404 for single-object model based pages per #857.
only build sqlite all the time

testing using ruby to build mysql and postgres every so often