fix(svg): Remove references to global.

* assume SVGElement can be defined in a global namespace.

Fixes issues when draggable is run a second time through Babel.

Fixes #162

Author: Anton Ivanov

lib/Draggable.es6

@@ -192,7 +192,7 @@ export default class Draggable extends React.Component {
 
   componentDidMount() {
     // Check to see if the element passed is an instanceof SVGElement
-    if(typeof global.SVGElement !== 'undefined' && ReactDOM.findDOMNode(this) instanceof global.SVGElement) {
+    if(typeof SVGElement !== 'undefined' && ReactDOM.findDOMNode(this) instanceof SVGElement) {
       this.setState({ isElementSVG: true });
     }
   }

package.json

@@ -69,4 +69,4 @@
   "dependencies": {
     "classnames": "^2.2.5"
   }
-}
+}