AnswerStats: Silence debug prints
Passage.ansfeatures: New feature, accumulate passage-specific features there

We will want to accumulate some info about the kind of clues that
selected this passage.

Conflicts:
	src/main/java/cz/brmlab/yodaqa/pipeline/solrfull/SolrFullPrimarySearch.java
data/ml/answer-train.py: Wider output columns
data/ml/answer-train.py: Produce Java code output suitable for direct pasting
LATMatchTyCor: baselat2 debug print typo fix