Add AF_OriginConceptBy{Subject,Focus,NE} (and corresponding ClueConcept flags)

It seems that especially Subject concept clues have much higher
probability of carrying the correct answer than others; it is in general
rather surprising that AF_OriginConcept has a big negative weight in
scoring, this might make things more interesting.

Conflicts:
	src/main/java/cz/brmlab/yodaqa/analysis/answer/AnswerScoreLogistic.java
	src/main/java/cz/brmlab/yodaqa/pipeline/solrfull/SolrFullPrimarySearch.java
AnswerScoreLogistic: Retrained with updated model
Merge branch 'f/conceptfeatures'

Conflicts:
	src/main/java/cz/brmlab/yodaqa/analysis/answer/AnswerFV.java