switched to bulk db requests for acl and metadata
switched to bulk es put operations

The size of the indexing batch size is now configurable.
Merge branch 'dev' of https://github.com/iPlantCollaborativeOpenSource/Infosquito into dev

Conflicts:
	src/infosquito/es_crawler.clj
	src/infosquito/icat.clj
	src/infosquito/progress.clj
	src/infosquito/props.clj