- work around Mono bug in GZipStream (see http://sourceforge.net/p/keepass/bugs/1373/) by including a custom GZipStream implementation
- fixed issue with export database to System file picker location
- fixed issues with preference options crashing with ActivityNotFound (due to changes in Xamarin 5.1, see https://bugzilla.xamarin.com/show_bug.cgi?id=33617
updated manifest/changelog
Added scopes for querying credentials
Extended possibilities of AppTasks
Added QueryCredentialsActivity.cs
Added missing AboutActivity.cs
FileSelectActivity: removed check for savedInstanceState=null. According to stackoverflow, savedInstanceState may be passed when launched from history
Passing of protected field lists added to PluginHost to allow full transfer of entries
