- any tableaux can be added, currently support euler, heun, RK3, RK4. example of usage in the AdvectionDiffusion application. the integrand is expected to assemble the mass matrix as the system matrix, while the load vector should be the value of the operator evaluation. git-svn-id: http://svn.sintef.no/trondheim/IFEM/trunk@2174 e10b68d5-8a6e-419e-a041-bce267b0401d