Create 0.2.0 milestone

[brylie]

If you want to use semantic versioning, it might be helpful to create a GitHub milestone to track work towards the next release.

After creating the initial release (issue #4), the next version would be 0.2.0. Create the 0.2.0 milestone, and assign the '0.2.0 Roadmap' task (issue #3) to that milestone.

[synw]

Ok I have created it. I never used milestones before: it looks usefull

[brylie]

Looks good.

For what it's worth, the milestones 0.2.0 and 0.2.0 Roadmap overlap. Only one or the other should suffice.