1.0.0: adding helpers for plotting convergence curves, add gomea, add examples

What's Changed

• New smooth discrete one plus one variants, for binary matrices by @teytaud in #1559
• hyperballs by @teytaud in #1563
• multimodal tool, and an example by @teytaud in #1561
• adding_plotting_curve by @teytaud in #1564

Full Changelog: 0.14.0...1.0.0