added inlet_example3D, fixed mesh_metric2_example in 3D, added support for constraint on total number of nodes, added fall back to for loops difficult eigendecompositions, cleaned up metric_pnorm to avoid an eigendecomposition, cleaned up minimal_example3D.py
added files related to previous commit message and deleted octaveimpl=True from inlet_example3D
Merge remote-tracking branch 'origin/master' into george_devel