Refactor / Update

[vincentsarago]

This is yet to be ready, and depends on cogeotiff/rio-tiler#225

[vincentsarago]

early notes:

• switched to rio_tiler.io.base.MultiAssetsReader with a custom class MultiBandReader which merge metadata (to aligned with metadata from COGReader)
  -bands -> assets: bandskeyword has be renamed assets (aligned with MultiAssetsReader`).
• new assets names for submodules (e.g for landsat assets are now names "B1", "B2"... instead of "1", "2")
• on each class init we are fetching either metadata or reference file to get some info about the scene (e.g MTL file for Landsat)

   with AWSPDS_L8Reader("LC08_L1TP_016037_20170813_20170814_01_RT") as landsat:
        assert landsat.minzoom == 7
        assert landsat.maxzoom == 12
        assert len(landsat.bounds) == 4
        assert landsat.assets == (
            "B1",
            "B2",
            "B3",
            "B4",
            "B5",
            "B6",
            "B7",
            "B8",
            "B9",
            "B10",
            "B11",
            "BQA",
        )

        metadata = landsat.info(assets="B5")
        assert len(metadata["band_metadata"]) == 1
        assert metadata["band_descriptions"] == [(1, "B5")]

        stats = landsat.stats(assets="B1")
        assert stats["B1"]["pc"] == [1206, 6957]

        metadata = landsat.metadata(assets=("B1", "B2"))
        assert metadata["statistics"]["B1"]["pc"] == [1206, 6957]
        assert metadata["band_descriptions"] == [(1, "B1"), (2, "B2")]

        tile_z = 8
        tile_x = 71
        tile_y = 102
        data, mask = landsat.tile(tile_x, tile_y, tile_z, assets=("B4", "B3", "B2"))
        assert data.shape == (3, 256, 256)
        assert data.dtype == numpy.uint16
        assert mask.shape == (256, 256)

[vincentsarago]

TO DO:

• Validate Class Names (AWSPDS_S1CReader, AWSPDS_S2L1CReader, AWSPDS_S2L2AReader,
  AWSPDS_L8Reader)
• Validate Class Names (sentine.aws.S1CReader, sentine.aws.S2L1CReader, sentine.aws.S2L2AReader, sentine.aws.S2L2ACOGReader,
• add top level helper function for sentinel (with sentinel({sentinel 1 or sentinel 2}) as sentinel ...)
• README
• Notebook