fix null handling in new InputFieldComparator
add changes
Merge pull request #1167 from crate/streamline-selects

streamline selects
don't use xcontent to set fetchSourceContext/version on SearchContext

this breaks "where _score" as minScore isn't set
anymore on the SearchContext.
build lucene query directly from symbols
support minScore in LuceneQueryBuilder
support type missmatches in EqOperator
fixup! support type missmatches in EqOperator
fixup! fixup! support type missmatches in EqOperator
fixup! fixup! fixup! support type missmatches in EqOperator