add ErrorHandling class, refactor spec
correct the raven config class
correct the raven test
add a fake method for getting an exception
require error_handling
add new TestError class to test exceptions
add correct error class to test
add rescue block to raven send
make method a class method and add a test Travis.config.dns
add error the repos to test error
remove carla method in repos
add a fake error in repos
delete carla method
