remove wrong claim
remove wrong claim

`make tox` _does_ run the slow tests, too

move the `make tests-all` documentation up right after the `make tests-quick` documentation
geometalab/osmaxx-frontend,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx-frontend,geometalab/osmaxx