#11 short vs. long labels "graphical" codecs

[Stefan Thater]

The current implementation of the MRS codec uses feature
structures (encoded as strings) as labels, which leads to a
complex layout if the MRS structure is displayed as a graph with
Leonardo or daVinci.

The layout could be improved if the graphical output-codecs
would use "short" labels.

[Alexander Koller]

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This is now much less of a priority, because uBench (=
Leonardo) now post-processes the node labels to make them
more readable.