Rework small vs. turbulent (cf. #736)

- Pipes.BaseClasses.WallFriction: add input Re_turbulent, replacing former internal constant Re_turbulent=4000
- Pipes.BaseClasses.FlowModels.TurbulentPipeFlow: base on WallFriction.LaminarAndQuadraticTurbulent, exploiting input Re_turbulent to optionally switch off laminar flow for backwards compatibility
- Pipes.BaseClasses.FlowModels.NominalTurbulentPipeFlow: base on WallFriction.LaminarAndQuadraticTurbulent, exploiting input Re_turbulent to adjust m_flow_turbulent
- System: reduce eps_m_flow to 1e-4, increase default dp_nominal from 0.01 to 0.1 bar
- Examples.InverseParameterization: extend to demonstrate m_flow_turbulent
- Examples.IncompressibleFluidNetwork: increase pipe diameters from 1 to 10 inch, resulting from better consideration of medium properties
- TestPipesAndValves.{SeriesPipes1, SeriesPipes2}: reduce dp_nominal of valves from 4 bar to 1 bar 


git-svn-id: https://svn.modelica.org/projects/Modelica/trunk@5907 7ce873d0-865f-4ce7-a662-4bb36ea78beb