Release 0.0.4

This release adds methods adds access to the jacobian and eigenvalues as properties:

    // run steady state
    console.log(instance.steadyState());

    // print jacobian
    console.log(instance.jacobian);

    // print jacobian
    console.log(instance.jacobian2D);

    // print eigenvalues
    console.log(instance.eigenValues2D);

    // print jacobian
    console.log(instance.reducedJacobian);

    // print jacobian
    console.log(instance.reducedJacobian2D);

    // print eigenvalues
    console.log(instance.eigenValuesReduced2D);