Changed mui-themeable HOC to have same displayName as its wrapped com…

…ponent.

src/mui-themeable.js

@@ -11,7 +11,7 @@ export default function muiThemeable(WrappedComponent) {
     return <WrappedComponent {...props} muiTheme={muiTheme} />;
   };
 
-  MuiComponent.displayName = `mui(${getDisplayName(WrappedComponent)})`;
+  MuiComponent.displayName = getDisplayName(WrappedComponent);
   MuiComponent.contextTypes = {
     muiTheme: React.PropTypes.object,
   };