Cleaned up QueryBuilder so that it handles searches itself.
Added (optional) concept ids to ESA
Merge remote-tracking branch 'origin/sr' into sr

Conflicts:
	wikAPIdia-lucene/src/main/java/org/wikapidia/lucene/LuceneSearcher.java
	wikAPIdia-phrases/src/main/java/org/wikapidia/phrases/LucenePhraseAnalyzer.java
	wikAPIdia-sr/src/main/java/org/wikapidia/sr/esa/ESAMetric.java