#2540 Added requests for VTK output in mesh based simulations in `TestCellBasedDemoTutorial.hpp` and `TestRunningMeshBasedSimulations.hpp`.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22513 b5f69653-2bf5-0310-8201-b0dafb8e1405
Better HOW_TO instructions for command line arguments in scons

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22514 b5f69653-2bf5-0310-8201-b0dafb8e1405
#2540 Added simulation output checks to the `TestVisualizingWithParaviewTutorial.hpp` tutorial and a note for users to remove these checks if they are exploring different input parameters.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22515 b5f69653-2bf5-0310-8201-b0dafb8e1405