Hopefully fix userpc60 build.

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@20997 b5f69653-2bf5-0310-8201-b0dafb8e1405
Pass file name to cell writer constructor

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21000 b5f69653-2bf5-0310-8201-b0dafb8e1405
Update notes on tutorial

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21001 b5f69653-2bf5-0310-8201-b0dafb8e1405
Correct comments

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21002 b5f69653-2bf5-0310-8201-b0dafb8e1405
Fix build

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21003 b5f69653-2bf5-0310-8201-b0dafb8e1405
Try again to fix intel build

git-svn-id: https://chaste.cs.ox.ac.uk/svn/chaste/trunk@21004 b5f69653-2bf5-0310-8201-b0dafb8e1405