added Duplicate namespace
removed element copy functionality from MeshRevision
added functionality to subdivide mesh elements without collapsing nodes
added tests and removed test functionality
added missing test
changes based on PR comments
Correct includes and namespaces in Test.
Squash. Whitespaces.
Replace copyX by a copyElement<X> template.
Merge pull request #6 from endJunction/MeshRevisionSubdivision

Mesh revision subdivision
adjusted documentation
Merge pull request #376 from rinkk/MeshRevisionSubdivision

Creating duplicates of mesh components