[yt-dev] Issue #1311: [Ramses] add possibility to force cosmological (yt_analysis/yt)

New issue 1311: [Ramses] add possibility to force cosmological https://bitbucket.org/yt_analysis/yt/issues/1311/ramses-add-possibility-to-f... Corentin Cadiou: Regarding discussions on pull request 2491, it would be great to be able to tell yt whether a simulation is a cosmological one by implementing an extra `force_cosmological` flag into the RAMSES data loader. The code would override any detection of the nature of the simulation using the value given in the flag. This can be useful for some cosmological simulations running down to `z<0` with `H0=1` that are detected as non-cosmological ones.