Fix: wrong usage of VTK smart pointers
run examples except cli argument
Create bunnyCGAL_HiFlow3.msml.xml

added bunny-example for run_examples.py using HiFlow3 specifications
Create bunnyTetgen_HiFlow3.msml.xml

added further bunny example where displacement constraints are put on the bunny's ear (in order to stretch these).
fix list_to_hf3
remove debug output
new simple example with the MSML text, see msml.stl
work on documentation
Added displacement constraints to sofa exporter
Added MeshInfoOperators to get basic information about surface meshes, namely number of elements, volume and surface area.
Merge branch 'master' into tetgen-more-params