setup of basic structure
setting element status and getting total numbers of nodes and elems
returning active nodes and elements vector
setting status based on mat id and returning active elements for a node
added comments
changed return type for connected active elements of a node to unsigned int
introduced element IDs
added algorithm-include to FixedTimeStepping to avoid compile error
added method for setting status to all elements, added tests
changes based on PR comments
changed iterators to constant functions where possible
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
adapted id parameter type for element classes
Merge pull request #365 from norihiro-w/add-surface-node-search

Add surface node search