Polar graphs could use some serious improvements in axis
descriptions (lines, ticks, labels).

Polar datasets don't support binary data.

There is no way to modify a dataset in Tkgraph.  Some sort of
spreadsheet capability would be useful.

The current method for selecting datasets to configure is
bad.  The user has no way of knowing which data set will be
configured until they change a property.

There is no way to configure a polar dataset.

Windows support would be very nice.

Loadable libraries using Tcl's "load" command needs to be added.
