Getting ready for 1.0.0-beta.1

Some final features and polish are going into Inkweld, along with the last preparations for the first beta release, 1.0.0-beta.1.

From the last few days:

• Scenes can be written as conversations, with each line in its own speech bubble (#1627).
• Inkweld offers to install itself as an app from the browser (#1626), so the Electron desktop app and the Android app are gone (#1630, #1625).
• Cloud Sync downloads work again, and documents open from the tree in Firefox (#1628).

You can try it at inkweld.app, or read the source on GitHub.