Fix crash on upgrade.
Merge remote-tracking branch 'upstream/master'
Merge pull request #569 from dosiecki/master

Android: Fix crash on upgrade.
Adding preference to move to next feed/folder when marking read.
Only moving to next feed when marking as read without a direction (older/newer).
Mark stories read locally before remote refresh. (#575) Fix time-bound marking. (#576)
Refetch story load state after story list is left so stories will be refreshed on next view. (#575)
Further tweak unread-only mode to reset session after mode switch. (#564)
Handle missing authors in story view. (#574)
Clarify comment.
Give users a way to send app feedback.
Be even more respectful of low device memory.
Fix sync hang on logout/login. (#572)
Add barebones profiling info to feedback reports.
Fixing infinite loop when marking last unread feed as read.
Fixing extra padding on focus segmented control in IE11.
Refine debug logging.
Merge pull request #578 from manderson23/master

Android: Dark theme tweak & #573
Fixing #579: incorrect keyboard shortcut in tutorial.
Merge pull request #577 from dosiecki/master

Android: Beta 3