Added: * Caching behavior: The configured Sphinx inventory is fetched at startup, and re-fetched automatically every 24 hours * Bot admins can force an update with the new `.rtfmupdate` command
0.1.1
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Changed: * Empty/missing query now outputs the docs' base URL instead of an error
Fixed: * `rtfm_base` was left in `bot.memory` after `shutdown()`