Make edges style (dashed/solid) customizable

[Michał Kukieła]

The edges in the graph are dashed and this is hardcoded in this line:

erd/app/Main.hs

Line 54 in 06c7264

 , A.Style [A.SItem A.Dashed []] -- easier to read labels, maybe? 

Can we make this customizable? I am aware of the Philosophy statement:

I don't intend for erd to have a large feature set with a lot of options for customizing the appearance of ER diagrams.

However, this dashed style may be confusing, because in some ERD notations (e.g. Baker's notation dashed lines have a meaning. In some usecases, like mine, this is a problem.

If this idea gets accepted, I'll be happy to make a PR.

[Akos Marton]

Sure, go ahead. You may look up the related graphviz documentation for the supported types of edges.