Merge pull request #14 from vvidal/master

Compilation without warning under Windows 7-64
system("PAUSE");
only for Windows
remove unused pragma
This version includes the new Mepp exception in the kernel. It also includes completes the auto registration
mechanism for the most of Dummy classes (Readers and Writers).
Small modification to the previous commit.
Merge pull request #20 from ruribe/master

Add Mepp exception and resitration code.
fix dlls compilation errors on Windows
cleaning and renaming
renaming, fix cmake for factory tests, improve cmake for header files
fix cmake after renaming...
add module FindOpenMesh.cmake - add empty skeleton for OpenMesh_Mesh - add empty skeleton for CGAL_Mesh
add empty skeletons for OpenMesh_ReaderAdapter, OpenMesh_WriterAdapter, OpenMesh_FilterAdapter and OpenMesh_FactoryMain
first version of OpenMesh_Mesh and OpenMesh_ReaderAdapter
fix cmake for APPLE
first version of OpenMesh_WriterAdapter
OpenMesh_Mesh is now templated for Traits
fix for Linux
OpenMesh is now OK - change empty CGAL skeleton
fix OpenMesh warnings under win64
CGAL_Mesh.hxx and CGAL_Traits.hxx now OK