rearrange extraction parsing
Make it reusable from different modules
sample server configuration file
move startup arguments in configuration file
return immutable Map
better handling of some corner cases
fix rdfLang mapping case
clone of abstract extractor that uses Wikipedia directly
support custom extractors in server
server/extraction/{lang}/extract has an option to extract either with the mapping testing or the custom extractors defined
make Config public
Merge pull request #218 from jimkont/server_test_extraction

server module custom extractor testing