Update comments and add @since version

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

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

src/main/java/org/orekit/rugged/los/PixelLOS.java

...t/rugged/refraction/AtmosphericComputationParameters.java

...a/org/orekit/rugged/refraction/AtmosphericRefraction.java

...in/java/org/orekit/rugged/refraction/MultiLayerModel.java

src/main/java/org/orekit/rugged/utils/GridCreation.java