Feature to initialise with specific dimensions

[stonebinox]

It would be great to provide an option to initialise the rectangle with fixed dimensions and maybe even a fixed rotational angle.

Something along the lines of:
width: 200, height: 300, angle: 0, allowResize: true|false

allowResize can be key to allowing the drag functionality to resize using the edges. If this is set to false, the rectangle can be placed onclick, instead of click and drag.

Ran into this problem yesterday while hunting for a solution with this plugin. I'll mostly try to modify the plugin myself for now.

Edit: After thinking it through, I think it makes sense to also provide an option to initialise at a specific coordinate as well.