Removed ImageComparisonFailure #575
Removed ImageComparisonFailure #575

ImageComparisonFailure no longer exists which causes issues with travis testing using the most recent matplotlib
SheffieldML/GPy,esiivola/GPYgradients,befelix/GPy,esiivola/GPYgradients,SheffieldML/GPy,befelix/GPy,SheffieldML/GPy,befelix/GPy,befelix/GPy,esiivola/GPYgradients,esiivola/GPYgradients,SheffieldML/GPy