Multiphase methods

Topics
	Additional fields
	Compute additional fields (normal, surface tension, smooth volume fraction, etc.)
	Front Tracking
	Level Set
	Level Set methods.
	Moment of Fluid (MOF)
	Implementation of the Moment-of-Fluid (MOF) method.
	Volume of Fluid (VOF)
	Volume of Fluid methods.

Namespaces
module	enum_phase_representation
	Module containing the list of the various phase representations.
module	enum_smoothing_method
	Module containing the list of the various phase representations.
module	notus_frontier_interface
	Dummy module for interfacing with FronTier (.
module	type_phase_geometry
	Definition of the type t_phase_geometry.
module	variables_multiphase
	Module containing the list of the various phase representations.
module	type_contact_line_point
	The type for a contact line point To ease its use, it's always 3D.

Detailed Description