ENH: turbulenceFields: various improvements
- 55f61a00 - ENH: turbulenceFields: enable custom prefix for output fields
- 8f16527a - BUG: turbulenceFields: unset duplicate already-registered fields
- 86f753b7 - DOC: turbulenceFields: improve header documentation
- 18905342 - STYLE: turbulenceFields: apply more recent OpenFOAM-coding practices
- 4243291c - BUG: turbulenceFields: use omega funcs of turbulence models (fixes #2132 (closed))