WIP #34: added channel map manager and new editor window. Removed a

number of unused classes.  Removed playlist manager from a number of
classes and replaced with the alias, channel and channel map models.
Updated playlist manager to no longer retain a playlist except for when
loading to models or when storing from models.  Extracted version 1 to
version 2 playlist conversion and changed playlist manager to keep the
original version 1 playlist and create a new version 2 (playlist_v2.xml)
file.  On startup, try to load a v2, and if not, look for a v1 to
convert.  Otherwise, don't create a playlist and one will be created
once the user adds items to the models.

src/alias/AliasModel.java

@@ -19,7 +19,9 @@ package alias;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.table.AbstractTableModel;
@@ -48,6 +50,7 @@ public class AliasModel extends AbstractTableModel
 
 	private List<Alias> mAliases = new CopyOnWriteArrayList<>();
 	private Broadcaster<AliasEvent> mAliasEventBroadcaster = new Broadcaster<>();
+	private Map<String,AliasList> mAliasListMap = new HashMap<>();
 
 	public AliasModel()
 	{
@@ -71,6 +74,31 @@ public class AliasModel extends AbstractTableModel
 		return null;
 	}
 	
+	public AliasList getAliasList( String name )
+	{
+		if( mAliasListMap.containsKey( name ) )
+		{
+			return mAliasListMap.get( name );
+		}
+		
+		AliasList aliasList = new AliasList( name );
+		
+		for( Alias alias: mAliases )
+		{
+			if( alias.getList().equalsIgnoreCase( name ) )
+			{
+				aliasList.addAlias( alias );
+			}
+		}
+
+		mAliasListMap.put( name, aliasList );
+
+		//Register the new alias list to receive updates from this model
+		addListener( aliasList );
+		
+		return aliasList;
+	}
+	
 	/**
 	 * Returns a list of unique alias list names from across the alias set
 	 */