Making output easier to read

[stefanlance]

I've added newlines to major outputs (new turns and level completion). I would also like to add color so that it's easier to distinguish between different kinds of output.

[stefanlance]

Here's what the output currently looks like:

Aside from adding other desired colors, the next step is probably to ensure that this works on OSX and Windows. I'm not using any gems to colorize the output, and I haven't tested this on other OSs, so I don't know if anything special needs to be done on other OSs' versions of rubywarrior.