Much of the Chart code and other things are common parts between Spreadsheets,
Documents, and Presentations. At least for the XML side of things. I propose
that the DrawingML portions of these three projects be consolidated into a
separate package or group of packages to deal with things like charts and
themes. If it is done correctly, this code should be able to be shared among
all areas of POI (XML format anyway). I haven't checked into the older binary
formats, but I suspect that there could be a similar relationship.
