Correctly handle responses with both content and errors.
Include app version in custom user-agent.
Merge pull request #462 from dosiecki/master

Android: Story Load Error Fix and Custom User Agent
Honour un-saving of stories in saved stories view.
Story list loads pages a bit before scrolling to end of list.
Fix flash of empty list view. (#458)
Fix flash of empty list view, take 2. (#458)
Even smoother story list preloading.
Stop overlay buttons from grabbing taps when invisible (#459)
Max overlay fully fade slightly sooner when scrolling down. (#459)
Merge pull request #465 from dosiecki/master

Android: Bugfixes
Limiting new user queue.
Merge branch 'master' into tagging

* master:
  Limiting new user queue.
  Max overlay fully fade slightly sooner when scrolling down. (#459)
  Stop overlay buttons from grabbing taps when invisible (#459)
  Even smoother story list preloading.
  Fix flash of empty list view, take 2. (#458)
  Fix flash of empty list view. (#458)
  Story list loads pages a bit before scrolling to end of list.
  Honour un-saving of stories in saved stories view.
  Include app version in custom user-agent.
  Correctly handle responses with both content and errors.