writer should work without metadata
updater should work without metadata
general cleanup of configurator
changed how index, type, id get set to allow for absent metadata
more consistent logging / exception handling
refactored to move duplicated code to new protected methods in ElasticsearchPersistWriter
Merge branch 'STREAMS-164'
addresses failing test in streams-processor-urls
Merge pull request #4 from apache/master

Merge Apache Master
STREAMS-179 | Added new thread pool executor to shutdown streams
STREAMS-179 | Added javdoc comments.
STREAMS-180 | InstagramTypeConverter is now able to properly serialize UserDataItem objects into Activities.
STREAMS-180 | Missing javadoc
STREAMS-180 | Fixing issue where NPE could be thrown if a post has no comments
Utility Processors to
 - populate datum from metadata
 - populate datum from metadata in document field
license / javadoc headers
Merge branch 'STREAMS-170' of https://git-wip-us.apache.org/repos/asf/incubator-streams into STREAMS-170
DocumentToMetadataProcessor utility processor