URL
http://api.imgble.com/border|<w>|<rx>|<ry>|<c>/http://mydomain.com/myimage.jpg
Parameters
<w> is the width in pixels
<rx> and <ry> are horizontal and vertical radii for rounded corners
<c> is the hex color of the border
Example
http://api.imgble.com/border|10|5|5|ff6600/http://farm1.static.flickr.com/57/197881059_aeb724b1cf.jpg
