Created by: portnov
- Add Precision parameter for Profile node (how many decimal places to use when generating profile from selection)
- Add "Curve points count" for Profile node (default number of vertices per curve segment)
- Add Precision parameter for Mesh Expression node (same as for Profile node).
- Update documentation.
Default values of new parameters are the same as values that were hardcoded earlier, so this change should not break existing layouts.