Image and image tile docs

src/ol/image.js

@@ -72,6 +72,7 @@ goog.inherits(ol.Image, ol.ImageBase);
 
 
 /**
+ * Get the HTML image element (may be a Canvas, Image, or Video).
  * @param {Object=} opt_context Object.
  * @return {HTMLCanvasElement|Image|HTMLVideoElement} Image.
  * @api

src/ol/tile.js

@@ -57,6 +57,7 @@ ol.Tile.prototype.changed = function() {
 
 
 /**
+ * Get the HTML image element for this tile (may be a Canvas, Image, or Video).
  * @function
  * @param {Object=} opt_context Object.
  * @return {HTMLCanvasElement|HTMLImageElement|HTMLVideoElement} Image.
@@ -73,6 +74,7 @@ ol.Tile.prototype.getKey = function() {
 
 
 /**
+ * Get the tile coordinate for this tile.
  * @return {ol.TileCoord}
  * @api
  */