Moved enumerates out of Rugged top level interface.

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/core/RuggedImpl.java

src/test/java/org/orekit/rugged/core/RuggedImplTest.java