Code review comment for lp:~ubiquity-slideshow/ubiquity-slideshow-ubuntu/middle-tweaks

This could still do with discussion, but I may as well get the ball rolling!

Here, the middle slides (the meat of this thing!) are being changed in response to user feedback and to produce a more consistent feel throughout. I am trying to hold on to the conventions Andrew S used for his simpler text, although with more writing than before. Let me know whether that is working :)