Merge branch 'master' of https://github.com/lukapor/NEST
ConstantScoreQueryBuilder - support for query builder (not only filter builder) http://www.elasticsearch.org/guide/reference/query-dsl/constant-score-query/
Similarity changes in es 0.90.0. http://www.elasticsearch.org/guide/reference/index-modules/similarity/
fixed merge conflicts and reran tests on lukapor/NEST before merging into master