Expand 4cat to other languages (Finnish)

[anitabraida]

These are the changes proposed in this pull request:

Wordlists added:

1. Finnish hatespeech wordlist (no offensiveness scores available)
2. Finnish wordlist with common vocabulary

Processors changed:

1. lexical_filter. Added Finnish hatespeech, introduced choice for the user to select the language. If the language selected is a highly inflected one (in this case, Finnish), it gives the user the option to choose between exact word match (present previously) and subword match (added in this pull request).
2. wikipedia_network. Added the option to find Wikipedia links in a Finnish language dataset.
3. neologisms. Added the Finnish wordlist with common vocabulary. The user has now the option to choose either English (default) or Finnish as the language. Pipeline changed accordingly.
4. tokenise. Added Finnish wordlist with common vocabulary for the filter. Added a lemmatization option for Finnish (uses SpaCy).
5. similar_words (presets). Included additional information.

In the setup, SpaCy is included again to allow for lemmatization on Finnish text.