Inconsistent plot labels

[pitts]

The placing of labels on plots using the "labels" command produces inconsistent results, either with one or multiple plots per Kapa window. Sometimes a label is closer to the axis, sometimes farther away, and sometimes does not appear at all (either it doesn't get written or is written off-screen).

This may have to do with its interaction (if any) with the "limits" and "box" commands, as they are often used just before or after the "labels" command.

[eugene]

I cleaned up the code that handles the label plotting to have more control over the number of chars and the number of significant digits. I believe this is all better now.