add generateRegularHexMesh() in MeshGenerator with tests
add == operator for Surface and Triangle
add MeshNodesAlongSurface and extend MeshNodesSearcher
add tests for MeshNodesAlongSurface
remove comparion operators from Surface and Triangle
documented where is the location of the origin
compare pointers instead of objects
Merge pull request #365 from norihiro-w/add-surface-node-search

Add surface node search