add nd comments and menu config for TileCache layer

git-svn-id: http://svn.openlayers.org/trunk/openlayers@3764 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

apidoc_config/Menu.txt

@@ -142,6 +142,7 @@ Group: OpenLayers  {
       File: Markers  (no auto-title, OpenLayers/Layer/Markers.js)
       File: MultiMap  (OpenLayers/Layer/MultiMap.js)
       File: Text  (OpenLayers/Layer/Text.js)
+      File: TileCache  (OpenLayers/Layer/TileCache.js)
       File: TMS  (OpenLayers/Layer/TMS.js)
       File: Vector  (no auto-title, OpenLayers/Layer/Vector.js)
       File: VirtualEarth  (OpenLayers/Layer/VirtualEarth.js)

doc_config/Menu.txt

@@ -142,6 +142,7 @@ Group: OpenLayers  {
       File: Markers  (no auto-title, OpenLayers/Layer/Markers.js)
       File: MultiMap  (OpenLayers/Layer/MultiMap.js)
       File: Text  (OpenLayers/Layer/Text.js)
+      File: TileCache  (OpenLayers/Layer/TileCache.js)
       File: TMS  (OpenLayers/Layer/TMS.js)
       File: Vector  (no auto-title, OpenLayers/Layer/Vector.js)
       File: VirtualEarth  (OpenLayers/Layer/VirtualEarth.js)

lib/OpenLayers/Layer/TileCache.js

@@ -7,6 +7,9 @@
  * @requires OpenLayers/Layer/Grid.js
  *
  * Class: OpenLayers.Layer.TileCache
+ * A read only TileCache layer.  Used to requests tiles cached by TileCache in
+ *     a web accessible cache.  Create a new instance with the
+ *     <OpenLayers.Layer.TileCache> constructor.
  *
  * Inherits from:
  *  - <OpenLayers.Layer.Grid>
@@ -17,35 +20,38 @@ OpenLayers.Layer.TileCache.prototype =
 
     /** 
      * APIProperty: reproject
-     * {Boolean}
+     * {Boolean} Try to reproject this layer if it is used as an overlay.
+     *     Default is false.
      **/
     reproject: false,
     
     /** 
      * APIProperty: isBaseLayer
-     * {Boolean}
+     * {Boolean} Treat this layer as a base layer.  Default is true.
      **/
     isBaseLayer: true,
     
     /**
      * APIProperty: tileOrigin
-     * {<OpenLayers.LonLat>} 
+     * {<OpenLayers.LonLat>} Location of the tile lattice origin.  Default is
+     *     bottom left of the maxExtent.
      **/
     tileOrigin: null,
     
     /** 
      * APIProperty: format
-     * {String}
+     * {String} Mime type of the images returned.  Default is image/png.
      **/
     format: 'image/png',
 
     /**
     * Constructor: OpenLayers.Layer.TileCache
+    * Create a new read only TileCache layer.
     *
     * Parameters:
-    * name - {String} 
-    * url - {String} 
-    * layername - {String} 
+    * name - {String} Name of the layer displayed in the interface
+    * url - {String} Location of the web accessible cache
+    * layername - {String} Layer name as defined in the TileCache configuration
     * options - {Object} Hashtable of extra options to tag onto the layer
     */
     initialize: function(name, url, layername, options) {
@@ -135,8 +141,7 @@ OpenLayers.Layer.TileCache.prototype =
 
     /**
     * Method: addTile
-    * addTile creates a tile, initializes it, and 
-    * adds it to the layer div. 
+    * Create a tile, initialize it, and add it to the layer div. 
     *
     * Parameters: 
     * bounds - {<OpenLayers.Bounds>}