added some more test cases for match predicate
Merge pull request #1190 from crate/h/match-tests

added some more test cases for match predicate
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
use LuceneQueryBuilder also for group by queries
optimize queries using the distance function

using the concrete DistanceFilter implementation should
result in better performance than the generic function
filter.
fix indentation in LuceneQueryBuilder
use BoundingBox or Polygon Filter to execute within queries

should be faster than the generic function filter
support regexp operator in LuceneQueryBuilder