Large rework of how punctuation is handled

[tomaarsen]

• Punctuation (commas, dots, apostrophes, etc.) are now split as a separate word.
• Update the database accordingly. Create a ..._backup.db file with the old database.
• Automatically update the settings.json file
• Further improved code quality
• Add a Tokenizer file that handles splitting up a sentence into tokens, and merging tokens back into sentences.
• Added a SentenceSeparator value, which is placed inbetween sentences, when multiple sentences are generated (only when the first sentence was too short according to MinSentenceWordAmount)

Left to do:

• [x] Get the README back up to speed.

[tomaarsen]

README was updated, merging with updater.