Results 3 issues of Roel Huybrechts

The [current documentation](https://pydov.readthedocs.io/en/latest/development.html#setting-up-your-environment) on our different requirements files (..) is not entirely up-to-date. We should * remove the requirements_appveyor.txt as this was removed in #251 * add docs/requirements_rtd.txt which is...

docs

From the [pyOpenSci review](https://github.com/pyOpenSci/software-review/issues/19): > Maybe pydocstyle can help to check static docstrings (you also can ignore erros you think any one doesn't apply for pydov). If you want to...

docs
CI

Since we have (most of the) code to do spatial filtering in WFS 1.1.0 POST GetFeature requests anyway and the standard is not going to change anymore, it makes sense...

upstream