Returns a list of the working database and all loaded datasets.
Examples
dataset_path <- gdataset.example_path()
gdataset.load(dataset_path)
gdataset.ls()
#> [1] "/tmp/RtmpPRIHdk/trackdb/test"
#> [2] "/tmp/RtmpPRIHdk/misha_dataset_1cd310b75c2b"
gdataset.unload(dataset_path)