Allow a fresh InputStream to be fetched.
Added placeholders for image properties.
Sorting out SLF4J dependencies.
Heavy refactored payload parsers into separate classes.
Adding other image fields.
Also declare the new fields.
Switched to docValues.
Added ImageAnalyser support.
ImageAnalyser to extract advanced features

Includes face detection and prototype colour analysis.
Updated following heavy refactor of the underlying indexer.
Hooking the test server into the build.
Disabling default type filtering.
Disable DEBUG logging by default.