v0.62.0

Features

• Let $() read the cell variables and bind user function parameters.
• Let @pick(k: …) fill ... and pick from the list a lone item gives, as @p does.
• Let @scene polygon and lathe take text and path.

Fixes

• Keep @scene's perspective, and the dragged view on click, when dragged.
• Trace text again once its font loads, and quote bare font families.
• Keep a huge @pick(k: …) index on an item instead of throwing.