Change the README's dependency graph picture to only show dependencies and not dev-dependencies?

[mitchmindtree]

At the moment the picture makes conrod's dependency eco-system look super complex, when really it's quite small.

[bvssvni]

I generated a new graph, which looks even more insanely large.

[bvssvni]

Posting it here, just for giggles.

[bvssvni]

I reported this earlier https://github.com/maxsnew/cargo-dot/issues/13. The problem is that cargo-dot uses Cargo.lock to extract dependencies, which does not contain any information separating dependencies from dev-dependencies.

[bvssvni]

Could use cargo-graph instead. There was a problem with filtering dev-dependencies, kbknapp/cargo-graph#4, but this is now fixed.

[mitchmindtree]

This is no longer displayed so going to close this.