Response should be more flexible

[Piotr Jasiun]

Additional parameters in the response should be handled. Default fileUploadResponse handler should pass all additional JSON data to the data. So for example response with height and width parameters:

{
    "uploaded": 1,
    "fileName": "foo.jpg",
    "url": "/files/foo.jpg",
    "height: 90,
    "width": 160
}

Should set evt.data.width = 160 and evt.data.height = 90.

[Tomasz Jakut]

I don't really know if my solution is elegant enough, but I noticed that the response parsed by default fileUploadResponse handler is passed back to the FileLoader instance and widgets have access only to it (via onUploaded callback) - so I thought that the response could be also attached to the FileLoader - and response property sounds most sane to me.

So widgets can get additional data from response using something like this:

onUploaded: function( loader ) {
	this.replaceWith( '<img width="' + loader.response.width + '">' );
}

The current version is in ​branch:t/13519

[Piotr Jasiun]

I pushed some additional commits and closed this thicket.

​git:1f04c2c