v0.8.2: Various stability improvements/fixes:

- fixed concurrency errrors in Sample.java
- added a null safety check to IconTitle
- fixed further rare freezing errors with tengu jumping
- reverted Android 'singleInstance' change, due to stability issues

android/src/main/AndroidManifest.xml

@@ -22,7 +22,6 @@
 		android:label="${appName}"
 		android:theme="@android:style/Theme.Black.NoTitleBar"
 		android:resizeableActivity="true"
-		android:launchMode="singleInstance"
 		android:allowBackup="true"
 		android:fullBackupOnly="true"
 		android:backupAgent=".AndroidBackupHandler">