Closed requested to merge features/TimeData into develop
- DifferentialOperations (former RegularFieldDifferentialOperations) processes time data: spatial operations (grad... div/rot) can operate on all time moments, time differentials (d/dt and d2/dt2) introduced. Time differentials can be computed for irregular time dependent fields.
- LineSlice operates on time data
- New options in RegularField module
- Some small cleanups (e.g.VNLogo)