Generator::GeneratorImpl: added methods to count the number of MathML nodes and retrieve the MathML node at index n.
Generator::GeneratorImpl: added methods to count the number of MathML nodes and retrieve the MathML node at index n.

nickerso/libcellml,hsorby/libcellml,cellml/libcellml,cellml/libcellml,MichaelClerx/libcellml,hsorby/libcellml,hsorby/libcellml,MichaelClerx/libcellml,hsorby/libcellml,nickerso/libcellml,nickerso/libcellml,cellml/libcellml,cellml/libcellml,MichaelClerx/libcellml,nickerso/libcellml