Add STREAM variables

[jenslys]

• Made a API wrapper as a helper to fetch the stream title and game https://github.com/jenslys/twitch-api-wrapper
  • Only downside of this is that the API returns nothing if the streamer is offline
• Uses https://stedolan.github.io/jq/ to fetch the json values, so this needs to be installed to be on existing servers. sudo apt-get install jq
• adds STREAM_TITLE and STREAM_GAME as variables to be used in STREAM_TITLE for example
  • API_CALLS needs to be set to TRUE before using the variables

Related issue/request: #17

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Todo:

• Add jq to install script, docker and readme
• Testing

[jenslys]

Works from the testing i have done.
closes #17

Will clean everything up once I move all variables to a separate config file.

[Tritri89]

Working as expected ! Good work @jenslys thank you !