[MRG] merge refact

src/main/java/org/orekit/rugged/api/Rugged.java

...it/rugged/refining/generators/GroundMeasureGenerator.java

...kit/rugged/refining/generators/InterMeasureGenerator.java

...ava/org/orekit/rugged/refining/generators/Measurable.java

src/main/java/org/orekit/rugged/refining/measures/Noise.java

...java/org/orekit/rugged/refining/measures/Observables.java

...va/org/orekit/rugged/refining/measures/SensorMapping.java

...rekit/rugged/refining/measures/SensorToGroundMapping.java

...rekit/rugged/refining/measures/SensorToSensorMapping.java

...ava/org/orekit/rugged/refining/metrics/DistanceTools.java

...g/orekit/rugged/refining/metrics/LocalisationMetrics.java

...d/refining/metrics/SensorToSensorLocalisationMetrics.java

...in/java/org/orekit/rugged/refining/models/OrbitModel.java

...g/orekit/rugged/refining/models/PleiadesViewingModel.java

src/test/java/org/orekit/rugged/api/RuggedTest.java

src/tutorials/java/AffinagePleiades/AffinageRugged.java

...utorials/java/AffinagePleiades/AffinageRuggedLiaison.java