meta/Lattice.m: prefix context to member variables of class Interactions

as well as to member functions.
meta/Lattice.m: move "new" from CNConstraintToCCode to CNConstraintsToCCode

so that the string from CNConstraintToCCode can be used as a call to a
base class constructor.
Generate lattice tsusy constraint
Comment out unused model input parameters in lattice EWSB constraint
Generate lattice SUSY-scale constraint