Few more bits and bobs:
 * Try to make some of the vertex remeshing a bit more efficient
 * Implement a faster algorithm for `ElementIncludesPoint()` - this deals with the case of points on an element boundary in a more systematic way
 * Bit of whitespace, of course


git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@18801 b5f69653-2bf5-0310-8201-b0dafb8e1405