Plot everything in a gtp-measure directory

[bennn]

Add new input format:

• given a directory created by gtp-measure
• make a pict for every output file (an overhead plot, or whatever)
• append all the picts into one png file
• save that file wherever (current directory, this package gets to decide)

[bennn]

5b9255a accepts data output by gtp-measure

it's a start