move MeshInformation into MeshLib namespace
add missing include in OGSFileConverter
make MemWatch class being accessible on any platforms, though it does nothing on Windows and Mac.
add a tool checkMesh
fix indentation
use Git SHA for version number
use FileIO::readMeshFromFile()
make the input file argument as unlabeled
add -v option to validate the mesh using MeshValidation class
Merge pull request #502 from norihiro-w/tool-mesh-summary

new tool "checkMesh"