Change DocOpenIEMain to compare two systems.
Print all three configs in Link printer, and add resolved arg column.
Separate OpenIELinker trait from OpenIELinked trait, remove Linker trait for now.
Change DocumentExtractors to use new OpenIELinker/OpenIELinked
Merge pull request #13 from rbart/link-context

Separate OpenIELinker and OpenIELinked traits and assorted output changes.