HDFS support for zarr format

fd73415 - Maxim Lippeveld, 2 hours ago : Open zarr images read only
2b46cdb - Maxim Lippeveld, 2 hours ago : Update check for hdfs
fac9ea7 - Maxim Lippeveld, 2 hours ago : Remove built docs
7fbbf76 - Maxim Lippeveld, 2 hours ago : Change path type to str to allow (hdfs) urls
1c288c4 - Maxim Lippeveld, 20 hours ago : Add some comments to yaml config
e253d32 - Maxim Lippeveld, 3 days ago : Add usage info
f829c85 - Maxim Lippeveld, 10 days ago : Correctly handle empty combined indices
ad28509 - Maxim Lippeveld, 11 days ago : Add external mode for connecting to existing cluster
afb48d5 - Maxim Lippeveld, 13 days ago : Add codecov badge
2602a20 - Maxim Lippeveld, 13 days ago : Document data loading modules
049f74c - Maxim Lippeveld, 2 weeks ago : pytest
b7f83e1 - Maxim Lippeveld, 2 weeks ago : Add codecov
f0866c9 - Maxim Lippeveld, 2 weeks ago : flake8
a4559e6 - Maxim Lippeveld, 2 weeks ago : Coverage configuration, add fixtures, fix quantile tests
cebd70c - Maxim Lippeveld, 2 weeks ago : Add feature extraction test
9bb1f6c - Maxim Lippeveld, 3 weeks ago : configure channel in combined mask
907cd5b - Maxim Lippeveld, 3 weeks ago : Start with main channel
f094440 - Maxim Lippeveld, 3 weeks ago : Correctly report number of workers