Visualization test update
add MeppQt4RenderEngineInterface
update
Merge pull request #54 from vvidal/master

Modifications done to be able to retrieve a filter from a unique std::string
Merge branch 'master' of github.com:MEPP-team/Gharial
change FunctorNew for CGAL_Mesh.hxx and OpenMesh_Mesh.hxx
Merge pull request #55 from mtola/master

update Controller, Visualization and RenderEngine mechanisms
Pipeline : some improvements : add the RemoveFilter method :

/**
   * Remove a filter identified by FilterInstanceName from the current pipeline.
   * Update the global processing consequently.
   * If the the pipeline has at least two filters, its first filter is not allowed to be removed!
   * If that filter is not present, nothing is done.
   */
  void RemoveFilter(std::string FilterInstanceName)