minor changes in SparqlifyDataset class
minor changes

- whitespace changes on QualityAssessment
- changed line order in Config
- renamed methods 'write...MeasureToDisk' to 'write...MeasureToSink'
added interlinking completeness metric
formatting and cleanup of sparqlify-qa pom.xml
minor changes to make eclipse warnings disappear

- mainly adding class types
now using a list of viewdefs to be written to sink

Previously in case of mappings measures just one view definition could
be written to disk. This was changed to accept a list of view
definitions.
added mapping measure support to BooleanTestingSink
minor changes on testing sinks

- whitespace changes on BooleanTestingSink
- replaced direct attribute access with getter method calls in
  BooleanTestingSink
- changed initialization in ValueTestingSink (-1 instead of null) to
  avoid null pointer errors
added intended conciseness metric and tests