[PROPOSAL] Markov sample separator

[adrienaury]

Problem

Markov Mask can be used on different samples:

• lists of words
• paragraphs

For list of words, we would want to read the file line by line (exemples: nameFR, pokemons, etc..)
For entire paragraphs, or text that can be spread over multiple lines.

Proposal

In addition of the separator parameter that determine the way we split the text (word by word, character by character, etc..), we would want a parameter that helps the mask to understand the structure of the text:

• is it a list?
• is it paragraphs?
• is it something else?

Anyway, markov mask should have a default configuration in order not to make it unusable.

Originally posted by @baguettte in #81 (comment)