Added 0.90.0 tag
Fixed python3 regression for python2. Fixed iterator in python2
Prepared 0.90.1 release. Bug fixing
Added ES (0.90.4) function_score_query (http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-function-score-query.html)
Merge from upstream
Merge branch 'release/0.90.1'
Added missing sys version
Merge branch 'hotfix/Added_missing_is_py3_variable'
Changed the merge back to six away from sys.version
Merge branch 'hotfix/0.90.1.2'
Added fix for wrong argument
Merge branch 'hotfix/0.90.1.2'
Merge pull request #357 from julianhille/master

new class for function_score_query