#2485 Adding aspect ratio computation for 3D Potts elements

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20805 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2485, broken build, trying another way of calling Lapack

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20806 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2485, commenting out r20805, PETSc being special

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20807 b5f69653-2bf5-0310-8201-b0dafb8e1405