Added default implementations of AdapterServices

This includes implementation of InputAdapterService
and OutputAdapterService.
Added default implementations of Knime module processors

This includes implementation of KnimePreprocessor and KnimePostprocessor.
Added default implementations of DataRow services

This includes implementation of InputDataRowService
and OutputDataRowService.
Added DataTable implementation of DataRow services

KnimeInputDataTableService implements InputDataRowService by providing
a DataRow from a DataTable.

KnimeOutputDataTableService implements OutputDataRowService by adding
Rows to a DataContainer.
Added String to StringCell Adapter
Added StringValue to String Adapter
Removed obsolete package export

Because scripting-java library was removed, this package was no longer available
to org.knime.knip.scijava for exporting.
Added export org.knime.knip.scijava.bridge.impl

This package contains special implementations like KnimeDataTableInputService
which are not discoverable at runtime, since not annotated.

The export was added for other projects to  be able to specifically use these.