[request] xlabel orientation
Created by: yvdriess
I'm currently relying heavily on dot for laying out a subway-map styled graph. xlabels are perfect for this job, as I can use point-style nodes and keep labels close without messing with the layout.
However, the always-horizontal xlabels are making metro-map styled graphs hard to read, as the nodes are preferably close together. For this use case, it would be sufficient to only consider eight label placements and rotations: left/right horizontally, up/down vertically and the diagonal positions and rotations. (see: section 4 in http://sydney.edu.au/engineering/it/~dmerrick/metromap/metromap.pdf)