Started iplementation of a parser for debug dumps.

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

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

...ava/org/orekit/rugged/utils/SpacecraftToObservedBody.java

src/test/java/org/orekit/rugged/errors/DumpParser.java