SpendThrift 3: Charts and Graphs

Back in SpendThrift 3: Bar graphs, Pie charts, and Line graphs in all their resplendent glory. Well, maybe that's overstating it. Some of the code for the charts and graphs was cleaned up. They should draw a bit better most of the time, and run a lot faster. There are a lot fewer wonky controls for them, and they're a lot more streamlined. Mostly, though, they're the same as before. Polishing up the look of them is definitely on the to-do list, but it's not done yet.