Kodi-nfo-generator

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- using `type` in JSON data to check whether episode data available (i.e., when `TVSeries`)

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- using `download-missing` no longer generates `Ignoring unhandled fanart type: download-missing`
message when fanart already present (just an output bug).
- improved checks for existing `.nfo` files to reduce IMDB requests
- added `kodi-nfo-rename` tool for renaming files using regular expressions
(e.g., files of TV shows)
- the `kodi-nfo-gen` tool now has additional options for matching episode files
rather than using hardcoded defaults: `--episode_pattern`, `--season_group`,
`--episode_group`.

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- added `kodi-nfo-guess` tool that performs online database searches for directories
that miss meta-files, like `.imdb`, which the `kodi-nfo-gen` tool uses as input.

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- adding `user-agent` to request headers now (https://github.com/fracpete/kodi-nfo-generator/pull/6)
- only making IMDB request when `--overwrite` flag present or `.nfo` not present, to avoid making
too many calls to IMDB
- the `--delay` no longer applies when not writing a file
- fixed TV show .nfo generation (https://github.com/fracpete/kodi-nfo-generator/issues/1)
- added `download-missing` choice for downloading fanart only when it is missing locally
(`download` always performs a download)

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- not all movie meta-data contains the `actor` field, now checking whether present
(https://github.com/fracpete/kodi-nfo-generator/pull/4)

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- `setup.py` excludes versions of beautifulsoup that don't work
(https://github.com/fracpete/kodi-nfo-generator/issues/2)
- added experimental support for generating .nfo output for TV series episodes
(https://github.com/fracpete/kodi-nfo-generator/issues/1)