Changes

A quick release to fix the fatal 'devnull' ImportError ([https://gna.org/bugs/?6403 bug #6403]). This bug effects those using Python versions < 2.4 and prevents relax from starting up. The solution was to import the object using a try statement to allow execution of the program. However if relax ever attempts to use 'devnull' a RelaxError is thrown, a message saying to upgrade to Python >= &ge; 2.4 is printed, and the program terminates. This is currently only a problem in the test-suite.