bugfix: possible crash if Play view not visible and low memory conditions occur (fixes #86)
cleanup: remove unnecessary property "controllerReadyForAction" in PlayViewController
improve memory management in various controllers (make it work the same as in PlayViewController)
bugfix: GameInfoViewController is now always released properly (closes #87)
bugfix: Play view GUI updates now work correctly after an error occurs while loading a game (fixes #89)
bugfix: app no longer crashes when an alert is displayed while loading a game (fixes #88)
add more logging to PlayView (actionStarts/actionEnds)
bugfix: SendBugReportControllerDelegate is now always deallocated (fixes #91)
SendBugReportController now has support for delegates (preparation work for #90)
refactoring: move code to determine default name for new save games to ArchiveViewModel
SendBugReportController now supports customizing of bug report message template
ComputerPlayMoveCommand now handles illegal moves (preparation work for #90)
preparation for release 0.9.2
cleanup: remove obsolete workaround in TableViewTextCell
merge hotfix-0.9.1 branch into develop