…s, and algebraic variables.

…d algebraic variables for initialiseVariables().

…d algebraic variables for computeRates().

…d algebraic variables for computeVariables().

…d algebraic variables for computeComputedConstants().

To do it manually is very time consuming while here it gets done automatically. From there, we can quickly confirm, using git, whether the new expected file contents is correct.

…tants, and algebraic arrays.

… an equation.

We will also need to keep track of states and constants.

…llml#1247.

…HH52 model with various external variables.

…dUnknownWithExternalVariable.

This is so that we can test an algebraic model with an external variable (in https://github.com/agarny/libCellMLGeneratedCodeTests).