We should now avoid dumping the same data several time (in sensors LOS,
datation and rate), and we use linear interpolation on replay between
the dumped LOS, datation and rates.

Conflicts:
	src/test/java/org/orekit/rugged/errors/DumpReplayerTest.java

The replay does not work correctly for now (the unit test fails), so
this needs more work.

This feature is useful when replaying debug dumps, as only a very small
subset of tile cells are usually dumped (hence numerous cells are not
known).