Merge pull request #17 from sgparrish/master

Use event.target in cases where _firstTarget has been removed from DOM

src/propagating.js

@@ -196,7 +196,7 @@ export default function propagating(hammer, options) {
     event.firstTarget = _firstTarget;
 
     // propagate over all elements (until stopped)
-    var elem = _firstTarget;
+    var elem = _firstTarget.isConnected ? _firstTarget : event.target;
     while (elem && !stopped) {
       var elemHammer = elem.hammer;
       if(elemHammer){