Refactored CifAfs->get_user_details() and added simple test for it
Began refactoring AFS user creation and deletion, with tests
Refactored most of CifAfs with tests, need to add new methods
Added some file methods to CifAfs
Added test file and improved integrity of CifAfs file copy test
Added more file methods to CifAfs with tests
Added method to set CifAfs working directory, with tests
Added tests to ensure that CifAfs is not vulnerable to shell injections