Incomplete/slightly broken features to consider not including in the tool in the first public release

[fedarko]

• edge hiding based on multiplicity/bsize (works ok in a non-collapsing model, but once you start collapsing clusters things start to go bad) -- it'd be possible to integrate this with the full graph model, but it'd take a lot of restructuring and I don't really have time for that before sunday
• complex bubble validation still doesn't work 100% perfectly. (is detecting invalid source-sink pairs, e.g. those weird bipartite structures from earlier, ok in a visualization context? #172)
• highlighting edge overlaps by changing edge style -- changing edge styles is really expensive, so this can really hamper performance on some large graphs. maybe we can just change edge color? also, we'd need to implement support for this for GFA and (maybe LastGraph? I forget if edge overlaps are possible in LastGraph) -- so I don't know if there's time to do that (#190)

[fedarko]

Actually this isn't really a "feature" and it isn't broken but just for future reference -- need to remove the username/pwd restriction on the demo. Also should move this repo over to MARBL, I guess?