Moved TileUpdate to raster package.

...main/java/org/orekit/rugged/geotiff/AsterTileUpdater.java

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

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

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

src/main/java/org/orekit/rugged/raster/Tile.java

src/main/java/org/orekit/rugged/raster/TileUpdater.java

src/main/java/org/orekit/rugged/raster/TilesCache.java

src/main/java/org/orekit/rugged/raster/UpdatableTile.java

src/test/java/org/orekit/rugged/api/RuggedTest.java

...org/orekit/rugged/intersection/AbstractAlgorithmTest.java

...rg/orekit/rugged/intersection/BasicScanAlgorithmTest.java

...rugged/intersection/duvenhage/DuvenhageAlgorithmTest.java

.../orekit/rugged/raster/CheckedPatternElevationUpdater.java

...java/org/orekit/rugged/raster/CliffsElevationUpdater.java

...java/org/orekit/rugged/raster/RandomLandscapeUpdater.java

...rg/orekit/rugged/raster/VolcanicConeElevationUpdater.java