Introducing expanded queries
Merge branch 'master' into devfilter

Conflicts:
	querqy-core/src/main/java/querqy/rewrite/commonrules/model/DeleteInstruction.java
Adding filter queries
Adding boost queries to ExpandedQuery
Merge branch 'master' into devfilter

Conflicts:
	querqy-lucene/src/main/java/querqy/rewrite/lucene/LuceneSynonymsRewriterFactory.java