Use pooch for downloading the test data

[dokempf]

This fixes #200

[codecov-commenter]

Codecov Report

Merging #271 (fdad85e) into main (3b64f1e) will decrease coverage by 0.16%. The diff coverage is 50.00%.

:exclamation: Current head fdad85e differs from pull request most recent head 44cfc3e. Consider uploading reports for the commit 44cfc3e to get more accurate results

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Additional details and impacted files

[](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) ```diff @@ Coverage Diff @@ ## main #271 +/- ## ========================================== - Coverage 74.07% 73.91% -0.16% ========================================== Files 23 23 Lines 3101 3094 -7 ========================================== - Hits 2297 2287 -10 - Misses 804 807 +3 ``` | Flag | Coverage Δ | | |---|---|---| | cxx | `87.21% <ø> (ø)` | | | python | `69.11% <50.00%> (-0.23%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) | Coverage Δ | | |---|---|---| | [src/py4dgeo/\_\_init\_\_.py](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg#diff-c3JjL3B5NGRnZW8vX19pbml0X18ucHk=) | `100.00% <ø> (ø)` | | | [src/py4dgeo/util.py](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg#diff-c3JjL3B5NGRnZW8vdXRpbC5weQ==) | `83.14% <50.00%> (-4.36%)` | :arrow_down: | ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). Last update [3b64f1e...44cfc3e](https://app.codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/271?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg).