Added a line chart for "Added over time" using the filesystem "Added At" date (which is what the XML feed returns)
Added chart for Collections within a library (unfortunately library items only list the first 2 collections in their detailed XML, so correlating which movies are in which collections, or watched VS unwatched within a collection, would be inaccurate and have not been included)
Also optimized the general structure of scripts.js and the data aggregation objects. I gave Jules (Google) a try and let it take a first pass at that optimization, and it did a pretty decent job. After a few manual passes it was ready for inclusion, and overall it saved some time while reducing some redundant blocks.