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
Merge remote-tracking branch 'upstream/master' into defaultview

Conflicts:
	clients/android/NewsBlur/src/com/newsblur/fragment/ItemListFragment.java