TeX/MetaPost stuff

I've developed a tree-drawing package for MetaPost, which will hopefully approach Qtree in ease of use, but inherit from MetaPost the ability to draw movement arrows, dashed or labeled edges, etc. I still update it from time to time and would appreciate suggestions. Before that, I wrote a frontend for PSTricks' tree-drawing package which is compatible with Qtree (except for \qroof), but retains the flexibility of the original PSTricks macro. TeX boxes have both a height and depth (above and below the baseline) but the way MetaPost and graphicx interact with each other isn't aware of this. Here is a pair of files to remedy this: This macro draws dialog-style thermometers for use in presentations: