Java improvements.

UI threading improvements.
Save user/site changes to file.
Ordering of user / site fixes.
Add questions to JSON output.
Bring JSON output format in line with C.

platform-independent/java/algorithm/src/main/java/com/lyndir/masterpassword/impl/MPAlgorithmV0.java

@@ -45,8 +45,6 @@ public class MPAlgorithmV0 extends MPAlgorithm {
         Native.load( MPAlgorithmV0.class, "mpw" );
     }
 
-    public final Version version = MPAlgorithm.Version.V0;
-
     protected final Logger logger = Logger.get( getClass() );
 
     @Nullable