Make it possible to use a custom embedding for lui et al. layout
Fix typo in comment
Add #toString() to the abstract st-ordering for easier debugging
Fix y axis up/down confused bug in LayoutEmbedding and its graph reader
Load the embedding from the input when drawing conflicting graphs
Make the gates conflict graph work
Fix a possible NPE and remove an inheritance obstacle in abstract
st-ordering
Add some doc comments
Add another layer of nodes to gates conflict graph
Slightly change the regular expression for adding coordinates in graphml
Add unfinished class to track faces of a planar embedding
Add collision detector