Added shallow water simulator with units.
Added shallow water simulator with units.

sintefmath/equelle,sintefmath/equelle,sintefmath/equelle,babrodtk/equelle,atgeirr/equelle,sintefmath/equelle,babrodtk/equelle,sintefmath/equelle,atgeirr/equelle,babrodtk/equelle,atgeirr/equelle,atgeirr/equelle,sintefmath/equelle,atgeirr/equelle,babrodtk/equelle,atgeirr/equelle,babrodtk/equelle,atgeirr/equelle,sintefmath/equelle,atgeirr/equelle,babrodtk/equelle,babrodtk/equelle,sintefmath/equelle