Sill v0.3.0

What's Changed

• Add a pull request template by @mrskiro in #32
• docs: 0.2.0 is submitted; write down the submit commands by @mrskiro in #33
• feat(editor): add a formatting toolbar on iOS and render Markdown in place by @mrskiro in #31
• feat(copy): put an HTML flavour on the pasteboard beside the Markdown by @mrskiro in #34
• docs: keep the answers App Review asks every new account for by @mrskiro in #36
• docs: drop the App Store notes; metadata/ is what asc applies by @mrskiro in #37
• feat(export): write the notes out as a folder of Markdown files by @mrskiro in #35
• feat(mac): tune the panel for flow notes — window chrome, header, delete, activation by @mrskiro in #38
• Point the site and READMEs at Sill Notes on the App Store by @mrskiro in #39
• metadata: App Store copy for 0.3.0 by @mrskiro in #41

Full Changelog: v0.2.0...v0.3.0