Added alternative - correct! implementation of cell volumes
Added grid_volume test
Removed some debug code
Fixed bug in enkf_main_set_fs() if trying to set current fs. Added documentation
Merge branch 'jpb-split-smoother-run' into ensemble_smoother
Merge remote-tracking branch 'jpb/ensemble_smoother' into ensemble_smoother
Merge pull request #270 from jepebe/ensemble_smoother

Added support for Ensemble Smoother
Merge pull request #271 from joakim-hove/volume-bug

Volume bug
Removed declaration out to support MS
Merge pull request #272 from joakim-hove/volume-bug

Removed declaration out to support MS
Merge remote-tracking branch 'upstream/master' into workflows