Add a Manifold/cube.off and a NonManifold/cubeNonMan.off useful for testing.
new simple meshes for testing.
minor modifications on Remeshing/RemeshingBaseOperations.h and LaplacianSmoothingMeshFilter.h
Add Data directory dependency (in a generic way) for easier testing.
Merge pull request #52 from vvidal/master

Minor modifications for easier testing : add a manifold mesh and 2 non-manifold meshes + add Data directory depency in Test (data used for testing should be put in the Data directory)