Added summary help section.

cli/src/main/groovy/com/jdbernard/wdiwtlt/cli/CommandLineInterface.groovy

@@ -741,6 +741,8 @@ Available commands:
     quit        Quit this program.
 
 A new user is advised to read the help section for the ${cmdStyle}select${normalStyle} command.
+
+For a quick list of options, consider reading the ${cmdStyle}summary${normalStyle} section.
 """
 
             // SCAN
@@ -804,6 +806,11 @@ ${cmdStyle}select files tagged as <tag-name>...${normalStyle}
     This selects all files that are tagged as *both* instrumental and
     orchestral.
 
+${cmdStyle}select untagged files${normalStyle}
+
+    Select all media files that do not have any tags associated with them.
+
+
 ${cmdStyle}select { album | artist | file | playlist | tag } where <criteria>...${normalStyle}
 
     ${errorStyle}Not yet implemented.${normalStyle}
@@ -848,7 +855,7 @@ ${cmdStyle}play <select-criteria>${normalStyle}
 
 """
 
-            // PLAY
+            // ENQUEUE
             // --------------
             case 'enqueue': return """\
 enqueue selection
@@ -862,6 +869,9 @@ enqueue <select-criteria>
     the selection.
 
 """
+
+            // ADD
+            // --------------
             case 'add': return """\
 add selection to playlist <id | name>
 
@@ -876,6 +886,8 @@ add <select-criteria> to playlist <id | name>
 
 """
 
+            // REMOVE
+            // --------------
             case 'remove': return """\
 remove selection from queue
 remove selection from playlist <id | name>
@@ -891,6 +903,9 @@ remove <select-criteria> from playlist <id | name>
     (including partial match).
 
 """
+
+            // tag
+            // --------------
             case 'tag': return """\
 tag <tag>...
 
@@ -910,6 +925,8 @@ tag <select-criteria> as <tag>...
     provided separated by spaces (tags cannot include spaces).
 
 """
+            // UNTAG
+            // --------------
             case 'untag': return """\
 untag <tag>...
 
@@ -930,6 +947,8 @@ taung <select-criteria> as <tag>...
 
 """
 
+            // CLEAR
+            // --------------
             case 'clear': """\
 clear                           Clear the terminal display.
 clear queue                     Clear the play queue.
@@ -986,8 +1005,66 @@ volume <percent>    Set the volume. <percent> may be any value from 0 to 200.
 """
 
             case 'help': return """\
+help summary        Display a quick summary of available commands.
 help <commmand>     Display detailed information about the given command."""
 
+
+            case 'summary': return """\
+Selecting files:
+
+    select { album | artist | file | playlist | tag } <id | name>
+    select { albums | artists | files | playlists | tags } where <criteria>
+    select files tagged as <tag>... and not as <tag>...
+    select playing { albums | artists | files | playlists | tags }
+    select queued { albums | artists | files | playlists | tags }
+
+    list selection
+    list <selection-criteria>
+    list selected { albums | artists | files | playlists | tags }
+
+Play and Controlling Media:
+
+    play
+    play selection
+    play bookmark <id | name>
+    play <selection-criteria>
+
+    next <count>        (alias: n)
+    prev <count>        (alias: p)
+
+    stop
+    pause
+    fasforward <duration> <time-unit>   (aliases: ff, fwd)
+    rewind <duration> <time-unit>       (aliases: rw, rwd)
+    jump <id | name>
+
+Playlist and Queue Management:
+
+    scan
+    enqueue selection
+    enqueue <selection-criteria>
+
+    add selection to playlist to playlist <id | name>
+    add <selection-criteria> to playlist <id | name>
+
+    remove selection from playlist <id | name>
+    remove <selection-criteria> from playlist <id | name>
+    remove selection from queue
+    remove <selection-criteria> from queue
+
+    create playlist named <name> from selection <id | name>
+    create playlist named <name from <selection-criteria>
+    copy playlist <id | name> as <new name>
+    create bookmark <id | name>
+    update bookmark <id | name>
+
+    clear
+    clear queue
+    clear selection
+    clear playlist <id | name>
+
+"""
+
             default:
                 err "Unrecognized command: '$line'"
                 drawLeader()