Updated ontology to latest.
Added a function to test for Commons namespaces containing metadata to ExtractorUtils, then modified ConfigLoader to support additional namespaces for Commons. Tested with LabelExtractor.
Added Commons support to InfoboxExtractor and RedirectExtractor.
Added try-catch to check for missing namespace definitions, tidied code.
Tidied code.
Added Template:... to namespaces that contain Commons metadata.
Updated mappingstats_commons to the latest extracted with the settings in this branch.
Merge pull request #227 from gaurav/feature/basic-commons-support

Basic support and mapping stats for the Wikimedia Commons