Temporarily moved node 0.8 to the "allowed failure" column due to jshint

Current versions of jshint has dependencies which use version #'s that
don't work with the version of npm travis runs for node 0.8. As such
the test runs always fail before they even start.

To get a clean test run I'm moving travis 0.8 to the allow failed column,
I will investigate how far we need to go back to get something to install
properly.