Per popular request, the added example shows how to use the Wookmark
plugin when you don't know the dimensions of the images. Paul Irish's
imagesLoaded plugin is used to wait until all images are loaded, before
triggering the grid layout update.
The new "autoResize" options triggers a layout update every time the
browser windows size is changed.
The example folder contains a documented basic example of how to set up
the HTML, CSS, and JS for a working grid layout.