Merge branch 'master' of ssh://www.orekit.org/rugged-main

design/dem-loading-class-diagram.puml

design/direct-location-class-diagram.puml

design/direct-location-sequence-diagram.puml

design/duvenhage-inner-recursion-activity-diagram.puml

design/duvenhage-top-loop-activity-diagram.puml

design/initialization-class-diagram.puml

design/initialization-sequence-diagram.puml

design/inverse-location-sequence-diagram.puml

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

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

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

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

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

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

src/main/java/org/orekit/rugged/errors/RuggedException.java

src/main/java/org/orekit/rugged/errors/RuggedMessages.java

...va/org/orekit/rugged/intersection/BasicScanAlgorithm.java

...va/org/orekit/rugged/intersection/IgnoreDEMAlgorithm.java

...org/orekit/rugged/intersection/IntersectionAlgorithm.java

...kit/rugged/intersection/duvenhage/DuvenhageAlgorithm.java