Homework 2 marks

I've uploaded the marks for homework 2 to Subversion; type "svn update" to pull them down from the repository.  I didn't withhold any tests this time, so they should match the output of test.sh and test.ps1.  If you're having trouble running the test scripts or understanding their output, please let me know and I'll try to help.  (If you do, please follow these guidelines for asking questions over email.)