Moved class MeshCoarsener to MeshLib/MeshEditing.
Moved Mesh2MeshPropertyInterpol to MeshEditing.
Moved ConvertRasterToMesh to MeshEditing.
Moved MeshGenerator to MeshEditing.
Moved some classes from folder MeshEditing to folder MeshGenerators.
Merge pull request #119 from TomFischer/RestructureMeshLibFiles

Restructure mesh lib files.