Release 0.15.1

• Better cleaning of training data
• Redacted person names in email addresses in the word frequency data

Evaluation scores:

TAG 96.88
POS 96.83
MORPH 92.50
LEMMA 94.12
UAS 87.94
LAS 83.59
NER P 83.15
NER R 81.76
NER F 82.45