removePunctuation skip [0-9](.|,)[0-9] with lookarounds
use little_world
fix multiple spaces removal
debut to trace logging
move and improve replaceAccents
use replaceAccents in stemming
fix TokenTest
add BaseModelTest
add getLexicon for LazyLoader
setLexicon, required for last commit
using LazyLoader to load Tokenizer
add seen_tokenizations, seen_stems and seen_synonyms dicts