don't output element node IDs in reversed order
don't set element nodes in the reversed order while reading
output ALL elements including line elements and also zero area/volume elemens.
duplicated nodes should be allowed to support zero volume elements
Removed method makeNodesUnique().
Merge pull request #239 from norihiro-w/change-ogs5msh-fileio

Change ogs5msh fileio
add reverseMeshNodeOrdering tool
add removeMeshElements tool
update Utils/MeshEdit/CMakeLists.txt to include new two tools
Merge pull request #27 from TomFischer/change-mesh-no-unique-nodes

Removed method makeNodesUnique().
Merge pull request #244 from norihiro-w/add-reverseNodeOrdering

Add two mesh edit tools: reverse node ordering, remove elements
Merge pull request #241 from norihiro-w/change-mesh-no-unique-nodes

Duplicated nodes should be allowed to support zero volume elements