Updated readme

Author: akesser

README.md

@@ -4,7 +4,17 @@ Exports HTML as string. HTML is minimized when the compiler demands.
 
 By default every local `<img src="image.png">` is required (`require("./image.png")`). You may need to specify loaders for images in your configuration (recommended `file-loader` or `url-loader`).
 
-You can specify which tag-attribute combination should be processed by this loader via the query parameter `attrs`. Pass an array or a space-separated list of `<tag>:<attribute>` combinations. (Default: `attrs=img:src`)
+Also every `<img srcset="..."`> is converted to `require` statements. For example
+``` html
+<img src="image.jpg" srcset="image.jpg 1x, image@2x.jpg 2x">
+```
+is converted to
+``` javascript
+"<img src=\"" + require("./image.jpg") + "\" srcset=\"" + require("./image.jpg") + " 1x, " + require("./image@2x.jpg") + " 2x \">"
+```
+
+
+You can specify which tag-attribute combination should be processed by this loader via the query parameter `attrs`. Pass an array or a space-separated list of `<tag>:<attribute>` combinations. (Default: `attrs=[img:src, img:srcset]`)
 
 To completely disable tag-attribute processing (for instance, if you're handling image loading on the client side) you can pass in `attrs=false`.