fixed PropertyCompleteness metric and moved mixin classes
renamed obsolete classes to provoke errors where still used
cleaned up settings file
added missing SML view file + minor cleanup
fixed SchemaCompleteness metric
fixed ExtensionalConciseness metric
fixed IntensionalConciseness metric
fixed error in QualityAssessment class

- a metric's threshold was not set due to a cast error
fixed NoDuplicateStatements metric
fixed BasicOntologyConformance metric
fixed DefinedClassesAndProperties metric
added explicit closing of RDB connections
fixed HomogeneousDatatypes metric
update of the test database configuration
updated .gitignore
fixed NoAmbiguousMappings metric
fixed NoBogusInverseFunctionalProperties metric
fixed NoDeprecatedClassesOrProperties metric
fixed NoOntologyHijacking metric
fixed NoResourceNameClashes metric