Using ace text editor

Hello,

Have you thought of including an optional editor?

I've been using it with [Ace (Ajax.org Cloud9 Editor)](http://ace.c9.io/#nav=about) and [with an angular module](https://github.com/angular-ui/ui-ace) as well.

``` html

Update flow chart

```

And in an angular controller:

``` javascript
var self = this;

//- ... Your controller code

$scope.updateFlowChart = function() {
if($scope.flowAceCode) {
if(self.chart) self.chart.clean();

self.chart = flowchart.parse($scope.flowAceCode);

self.chart.drawSVG('flowchart-div', {
...
});
} else if(self.chart)
self.chart.clean();
};
```

The power of this library relies on the fact that [you can write your own syntax highlighter](http://ace.c9.io/#nav=higlighter).

Cheers!