Update documentation and minor cleanup.

package.json

@@ -48,6 +48,6 @@
         "test": "grunt test",
         "prepare": "grunt build",
         "build": "grunt build",
-        "dev": "grunt connect watch"
+        "dev": "grunt dev"
     }
 }

src/datatypeconvertor.js

@@ -373,7 +373,7 @@ $.DataTypeConvertor = class {
     }
 
     /**
-     * Destroy the data item given.
+     * Copy the data item given.
      * @param {OpenSeadragon.Tile} tile
      * @param {any} data data item to convert
      * @param {string} type data type

src/tilesource.js

@@ -436,10 +436,11 @@ $.TileSource.prototype = {
      * Responsible for retrieving, and caching the
      * image metadata pertinent to this TileSources implementation.
      * There are three scenarios of opening a tile source:
-     * 1) if it is a string parseable as XML or JSON, the string is converted to an object
-     * 2) if it is a string, then
-     *   internally, this method
-     * else
+     * This method is only called by OSD if the TileSource configuration is a non-parseable string (~url).
+     *
+     * The string can contain a hash `#` symbol, followed by
+     * key=value arguments. If this is the case, this method sends this
+     * data as a POST body.
      *
      * @function
      * @param {String} url

src/viewer.js

@@ -1584,7 +1584,7 @@ $.extend( $.Viewer.prototype, $.EventSource.prototype, $.ControlDock.prototype,
      *      A set of headers to include when making tile AJAX requests.
      *      Note that these headers will be merged over any headers specified in {@link OpenSeadragon.Options}.
      *      Specifying a falsy value for a header will clear its existing value set at the Viewer level (if any).
-     * @param {Function} [options.success] A function tadhat gets called when the image is
+     * @param {Function} [options.success] A function that gets called when the image is
      * successfully added. It's passed the event object which contains a single property:
      * "item", which is the resulting instance of TiledImage.
      * @param {Function} [options.error] A function that gets called if the image is

test/demo/filtering-plugin/plugin.js

@@ -17,12 +17,6 @@
     if (!$) {
         throw new Error('OpenSeadragon is missing.');
     }
-    // Requires OpenSeadragon >=2.1
-    if (!$.version || $.version.major < 2 ||
-        $.version.major === 2 && $.version.minor < 1) {
-        throw new Error(
-            'Filtering plugin requires OpenSeadragon version >= 2.1');
-    }
 
     $.Viewer.prototype.setFilterOptions = function(options) {
         if (!this.filterPluginInstance) {
@@ -81,7 +75,6 @@
                 await processors[i](contextCopy);
             }
 
-            tile._filterIncrement = self.filterIncrement;
             await tile.setData(contextCopy, 'context2d');
         }
     };