Multiple files

I added support for parsing multiple files at once all within the same badge. This was a rather quick fix. It seems  I can't pass and array as `dist` therefore I had to extend the API slightly. 

All previous features are supported:

```javascript
targethtml: {
	build: {
		src: "app/index.html",
		dist: "deploy/index.html"
	}
},
```

but now it also accepts:
```javascript
targethtml: {
	build: {
		src: [ "app/index.html", "app/static.html" ],
		out: [ "deploy/index.html", "deploy/static.html" ]
	}
},
```

I am sure this can refactored or tweaked. Just putting this out there. What do you think?