basic _import endpoints with node distribution
renamed imports packages to import_
no preferences and routing for imports, remember only index and type as string
added importer structure and directory param check
implemented importer with json response
Merge branch 'master' into import-endpoint

Conflicts:
	src/main/java/crate/elasticsearch/plugin/export/InOutPlugin.java
	src/test/java/crate/elasticsearch/module/export/test/RestExportActionTest.java
use bulk processor, only display success and failure counts per file
typo: successes
terminate node for working subsequent tests
fixed ttl handling with timestamp set and made some more tests
count bulk in progress with atomic long, use hasFailures
added synchronisation for import response
added gzip compression flag to import
use node_id instead of nodeId for consistency
added import documentation
prepare release
created SNAPSHOT version