Global cell indices for mesh
Merged fenics-project/dolfin into master
Merged fenics-project/dolfin into master
Merged fenics-project/dolfin into master
Merged fenics-project/dolfin into master
Merge with nag-dcse/master
Merge branch 'master' into hdf5_cell_indices
Read back cell indices from mesh
const fixes.
Minor formatting change.
Merge branch 'chris/hdf5-cell-indices'