Support non ansi terminals

When using climate on a terminal that doesn't support ansi escape sequences they are just dumped out with the content.

Taking a lead from symfony/console (https://github.com/symfony/symfony/blob/master/src/Symfony/Component/Console/Output/StreamOutput.php#L95) I've added support for "undecorated" output.

This is only for basic output, it doesn't handle dynamic output (I didn't want the pr to grow too large).
What are your thoughts on this? Useful? Misuse of CLImate?