check CR in Czech and try to enhance it

[michnov]

cs-en/batch2q/runs/$ANY/treexfiles/0011.streex##15

Check why the first Czech dropped pronoun in 3rd person (created by mistake) is labelled as non-anaphoric.
Check if the attribute 'aux_gram/gender' is correctly used in CR.

[michnov]

aux_gram/gender - it is set only for dropped subjects
multi_gram/gender - set for all semantic nouns
Coref::CS::SetMultiGender

• does the job of turning aux_gram to multi_gram and setting multi_gram for the rest
• must precede coreference resolution
  fixed in commits 1d03e9f .. 4b17d19

TODO

there is a bug in generating coreference features for the anaphor: c_anaph_gen_* do not comply with c_anaph_gen

• this change should require retraining the model

[michnov]

Changes made in the gram_gender_multivalue branch. So far (commit 1e8413e), the following has been done:

• gram/gender and gram/number supports multiple values, delimited by the | sign
  • the wilds aux_gram/gender and multi_gram_gender/gender replaced by gram_gender
  • multivalues also for gram/number
  • A2T::DisambiguateGrammatemes applies on gram_gender and gram_number
  • TODO: delete Block::Coref::SetMultiGender
• not using the wilds in the coref features Tool::Coreference::CS::PronCorefFeatures
  • a bug with mismatch in c_{anaph|cand}_gen_* vs. c_{anaph|cand}_gen fixed
• model retrained with new features
  • performs worse in terms of BLEU on qtleap/cs_en/news: 13.11 vs. 13.06
  • TODO: the performance should be increased
• antecedent candidates checked if they are not already coreferential with an anaphor
  • to prevent cycles