v0.1.0-beta.1

First version.

• Presents itself to Plex as an HDHomeRun tuner and lists the channels from channels.toml.
• Resolves YouTube live channels, broadcaster pages and HLS playlists when a viewer tunes in,
  picks the best quality, and remuxes it with ffmpeg without re-encoding.
• Reconnects on its own when a source drops or stalls.
• Builds an XMLTV guide from XMLTV sources, with placeholder blocks for every gap.
• Reloads channels.toml on change and keeps the last good list if the new one has a mistake.
• tellyard check reports the resolution each channel really sends, against an optional MIN_HEIGHT.
• Takes its settings from environment variables and its channels from channels.toml.