v0.1.0

First release.

• 48 hour timeline of regional carbon intensity and Octopus Agile prices for a UK postcode.
• Best start time for each job (washing, dishwasher, EV charge, batch job, or your own), ranked by
  carbon, price or both.
• Generation mix rows (wind, solar, gas, nuclear, ...) on the same time axis.
• --line, --tmux, --watch and --json for status bars and scripts.
• Six themes (carbon, daylight, slate, ember, mono, colorblind), 12/24 hour clock, compact layout
  for small panes.
• Works offline from cache. Talks only to the two APIs over HTTPS.