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/module/decode/p25/P25Decoder.java

@@ -1,9 +1,9 @@
 package module.decode.p25;
 
+import alias.AliasList;
 import instrument.Instrumentable;
 import module.decode.Decoder;
 import module.decode.DecoderType;
-import alias.AliasList;
 
 public abstract class P25Decoder extends Decoder implements Instrumentable
 {