Thu, 10 May 2012 16:15:27 +0100 mjsousa Add some comments...
Thu, 10 May 2012 16:09:50 +0100 mjsousa Add high level comments.
Thu, 10 May 2012 15:40:19 +0100 mjsousa Fix comment.
Wed, 09 May 2012 23:13:04 +0100 mjsousa Fix the previous commit: check for errors in expressions used as subscripts.