#2570 Output modifier.  Use case 2: activation and recovery.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22158 b5f69653-2bf5-0310-8201-b0dafb8e1405
Move public lung code into a separate lung component

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@22161 b5f69653-2bf5-0310-8201-b0dafb8e1405