Added rectilinear grid support for vtk (*.vtr)
Merge pull request #55 from CVerhoosel/VtkRectilinearGrid

Added rectilinear grid support for vtk (*.vtr)
Added point vertex functionality to gmsh
Merge branch 'master' of github.com:nutils/nutils
Merge pull request #56 from CVerhoosel/gmshpointvertices

Added point vertex functionality to gmsh
Merge branch 'master' of github.com:nutils/nutils
bugfix gmesh reader
Merge branch 'master' into finitecell
add allunique, minmax
separate volume and divergence test
finite cell thorough triangulation fix