Output rework

Change the output of each command to simply output each git command in bold and the output of that command immediately after. 

Cleanup error messages to follow suit of what `git rebase` errors look like (but print in red to easily catch the eye).

To get a look, run a single cucumber test with the commands printed out.
 `cucumber features/git-ship.feature:3 DEBUG=true`
Sorry on further thought, I will defend how it looks currently. The red at the bottom lets you know there was an error and naturally you look at the output of the last command which will explain the error.