Exception detection in Pipeline::run()
OpenMesh file reading : manage empty file!
BidirectionalIterator.hxx added!
HalfEdgeBuildInterface.hxx added!
Restructuration of iterator interface.
Merge pull request #26 from ruribe/master

Fixing potential memory leaks.
Merge Conflicts:
	Src/Kernel/ObjectFactory.cxx
	Src/Kernel/ObjectFactory.h
Merge pull request #27 from vvidal/master

Catching exception in Pipeline::run() and allowing empty mesh file read
add OpenMesh_to_CGAL_Mesh and CGAL_Mesh_to_OpenMesh converters,
see OpenMesh_FilterAdapter.cxx for sample:

1) OpenMesh_to_CGAL_Mesh
2) CGAL triangulation
3) CGAL_Mesh_to_OpenMesh

but still problem during writing process (Ricardo, if you can look at this please...)
OpenMesh_FilterAdapter now Ok (thanks Ricardo)
OpenMesh_Mesh and CGAL_Mesh are now templated by TTraits
This commit fixes an small problem in the MVC architecture.