made _search_into endpoint cross cluster aware
Merge branch 'master' into searchinto-cluster

Conflicts:
	CHANGES.txt
Merge branch 'master' into reindex

Conflicts:
	src/main/java/crate/elasticsearch/action/searchinto/TransportSearchIntoAction.java
	src/main/java/crate/elasticsearch/plugin/inout/InOutPlugin.java
	src/test/java/crate/elasticsearch/doctests/DocTest.java
	src/test/python/search_into.txt
	src/test/python/tests.py