updated hiflow3, added pressure constraint
extensions and corrections to HiFlow3 exporter, addons to msml-alphabet in msml.xsd, putting Nico as author, too, and adding a HiFlow3-bunny-example to run_examples.py
Fix: missing return value
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.
added api to documentation
Merge branch 'master' of https://github.com/CognitionGuidedSurgery/msml

* 'master' of https://github.com/CognitionGuidedSurgery/msml:
  Added MeshInfoOperators to get basic information about surface meshes, namely number of elements, volume and surface area.
  Added displacement constraints to sofa exporter
Testing bug: NotImplementedError: Wrong number or type of arguments for overloaded function 'GenerateDVF'.
fix #42
Merge pull request #68 from CognitionGuidedSurgery/GenerateDVF_bug

fix output request data type in SOFAExporter
added colorama for terminal colors under windows
Add: Interface to use shell command as operators + conversion operator.