Major Description
Add a CoverageAggregator class capable to receive an arbitrary amount of GridCoverage or GridCoverageResource, and build a view which is a data cube where all given coverages is a slice.
For example if the user has 100 files for the same phenomenon (e.g. Sea Surface Temperature) one the same geographic area but at different dates and times t, then CoverageAggregator will build a new GridCoverageResource in which each request for data (x, y, t) will load the file corresponding to instant t.
Above example used files, but CoverageAggregator should work with any implementation of GridCoverageResource, no matter if loaded from a file or computed.