classes, tests, and configurations for lobid-rdf to oai_dc transformation
Clean up

- CamelCase classnames
- add test to testsuite
- fix compiler warnings
- delete HT.n3 file
- add descriptions, annotations
Add constructor with AcceptHeader to HttpOpener
HttpOpener with named arguments
Formatting, Cleanup
Merge pull request #65 from jschnasse/oai_dc_conversion

classes, tests, and configurations for lobid-rdf to oai_dc transformation