DebugInfo:
Report an information message using Foam::Info if the local debug
switch is true
DebugInFunction:
Report an information message using Foam::Info for FUNCTION_NAME in
file __FILE__ at line __LINE__ if the local debug switch is true
The implementation now correspond to the definitions in the readily
available reference:
http://personalpages.manchester.ac.uk/staff/david.d.apsley/specturb.pdf
in which a large number of linear and non-linear models are presented in
a clean and consistent manner. This has made re-implementation and
checking far easier than working from the original references which anyway
are no longer available for the LienCubicKE and ShihQuadraticKE models.
