Create language filter

[gunthercox]

When I'm presenting an application built with ChatterBot, having this filter enabled will make it so that the chat bot cannot return a response with a swear in it :)

That's what I get for using Twitter as a source of training data 😵

WIP status:

• Resolve issue with random response and base query
  • Priority for filters?
• Resolve issue with response data containing results that we want to ignore

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Closes #1052

[ThomasKoscheck]

How can I use this swear words filter?

[gunthercox]

Hi Thomas, it currently can't be used because I never finished these changes. I've been meaning to work on it but I've been busy creating and updating other parts of ChatterBot.

[ghost]

These kinds of filters are ridiculous, just let the thing grow as it should, if it says something inappropriate oh well.

[gunthercox]

I'm going to close this pull request off. Instead of creating a filter for foul language, I'm going to introduce a more generic change that will allow a list of words to be provided such that the chat bot will not choose a response there the text includes one of those words. It will be up to developers using ChatterBot to choose what those words should be.