#1902 add method to `NodesOnlyMesh` to return which initial nodes it uses, and correct `NodesOnlyMesh::GetMaximumNodeIndex()` to cope with receiving nodes with different indices.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18685 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2205 enable the use of boost binary archives.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18695 b5f69653-2bf5-0310-8201-b0dafb8e1405