Merge pull request #329 from Rulexec/master

Thorfile typo fix and chainable on/off.

src/Layer.js

@@ -98,6 +98,7 @@
          */
         beforeDraw: function(func) {
             this.beforeDrawFunc = func;
+            return this;
         },
         /**
          * set after draw handler
@@ -107,6 +108,7 @@
          */
         afterDraw: function(func) {
             this.afterDrawFunc = func;
+            return this;
         },
         /**
          * get layer canvas

src/Node.js

@@ -52,6 +52,7 @@
                     handler: handler
                 });
             }
+            return this;
         },
         /**
          * remove event bindings from the node. Pass in a string of
@@ -89,6 +90,7 @@
                     delete this.eventListeners[baseEvent];
                 }
             }
+            return this;
         },
         /**
          * remove child from container, but don't destroy it