GEOMESA-433,GEOMESA-434,GEOMESA-484 Develop raster and ingest handling c...

...ode for integration with GeoMesa. Implement raster ingest as a new maven submodule. Create a new Store for raster data.
Prefer:

```scala
mutations.foreach { m => writer.addMutation(m) }
```

Import ```scala.collections.JavaConversions._``` if necessary.