Total refactor of all standarized test into parametrized class TestRunner. Changed folder for manual image properties. Implemented ExtractorProperties that is a special case of specialProperties.
Added Version of Extractor to extractors. Normalized values. Added accepted values to context.
Moved test files and extractors into differ-common. TODO: locate all code is still duplicated or not needed e.g. pom.xml dependencies
Fixed kdu_expand extractor version with new bean ManualExtractorVersion
Changes to differ-common for manual extractor version
Small fix to add (latest known) to versions added manually
Merge pull request #19 from Differ-GSOC/unittest

Unittest fixes