fixed wrong parent version in component poms
fixed pom.xml files
R2RML export rewrite

* now supports multiple predicate object maps in one Triples Map
* now supports referencing object maps
* more information (already given in SML) extracted to the R2RML RDF:
  * datatype
  * term type
  * language tag
built prototypic framework and environment for sparqlify-qa
added notes during Claus' review
minor updates on views.sparqlify

- removed and updated some comments
- removed leading + in SML addition
- no changes of the semantics of the mappings
minor changes on Pinpointer and ShortUri
introduced Triples instead of Statements

- the QualityAssessment instance now gives a Triple object to the
  registered metrics instead of a heavyweight Statement instance
updated and fixed ShortUri metric
added HttpUri metric
minor fixes of HttpUri metric
added tests for HttpUri metric
refacturing and new class hierarchy for metrics

- put things that are not metrics or metric base classes or interfaces
  in separate packages
- introduced MetricImpl, PinpointMetric and PinpointDbMetric to avoid
  redundant code (mainly setter methods)
fixed pinpointer registration in QualityAssessment

- only the class name was considered when deciding whether to register a
  pinpointer or not
- now all the base class names are considered
added writeToSink method in metrics base class

- added the method writeToSink to the MetricImpl class to avoid
  redundant code in all the metric implementations
- this method is a first shot approach and should not last forever;
  suffices since the interface to the MeasureDataSink is not clear, yet
configured threshold now used to decide if URL too long

- the ShortUrl metric now uses the threshold defined in the
  metrics.properties file to decide if a URL is considered too long or
  not
added SoundingUri metric
minor comment update
manually checked word list for trigram stats
minor fix of HTTP URL check Regex

- found out that non-escaped dashes cause errors in the display shell
  and so also escaped them