2D Haroche model in smallfem + bug fix in SystemEigen::getSolution()


git-svn-id: https://geuz.org/svn/gmsh/trunk@19543 59c8cabf-10d6-4a28-b43f-3936b85956c4
Moved evaluation of measures back in class Patch (to make future parallelization easier)  

git-svn-id: https://geuz.org/svn/gmsh/trunk@19544 59c8cabf-10d6-4a28-b43f-3936b85956c4