Convert URL-providing locators to data-providing loaders. They're `async` too, so complex, multi-step processing becomes possible - [x] `transformSeries` is `async` too, just in case - [x] `SeriesLoader` - [x] `DZILoader` - [x] `TileLoader` - [x] `AtlasLoader` - [x] `AtlasVolumeLoader` - [x] rename `locators` object - [ ] update inline documentation - [ ] update readme - [ ] update example deployment.
Convert URL-providing locators to data-providing loaders. They're
asynctoo, so complex, multi-step processing becomes possibletransformSeriesisasynctoo, just in caseSeriesLoaderDZILoaderTileLoaderAtlasLoaderAtlasVolumeLoaderlocatorsobject