Allowing more export options

[medape]

Hi, and thank you very much for your script! Extracting my playlists so I can think of sharing them would have been impossible otherwise.

I tried to make the summary of each commit self-descriptive.

This PR meets two main goals:

• the SQL query was rather lazily expanded to get all information on the intersection of tables streams, playlist_stream_join and playlists, and I used a code sample in the Python tutorial for the sqlite module to return this information as a named dict.
• added more export options:
  • each playlist as a .m3u8 file
  • all playlists as a .md file (not standard at all, but I wasn't sure about altering the exports to .txt
  • all internal data as JSON (mostly so we can quickly check what information is there in the database without running the same commands every manually)
  • as an extra, I re-coded the logo and created alternative logos so that the script "compresses" the logo if the terminal is not wide enough when starting the script.

[Quasolaris]

Hi medape Thank you for this additions and cleanups, I will look at it as soon as I got time!

[Quasolaris]

Thank you for the new features and the clean up! I did not knew the .m3u8 format, cool idea will use it in the future.

Time to change the credits to a link pointing at the contributors, as I did not expected to have pull requests on this script. Very cool to see that the script is used and expanded by others. Maybe it is time to expand it with an optional GUI or PIP-Package.

Thanks again!