Removing Gun Analogy

I don't really like Gun analogy here. I think we can do without it. I have made some edits, you can use them or I am sure community can come up with other positive analogies.

Also I think gun analogy is wrong anyways, as guns really don't make anything easy. They really don't add any value. Cars add value, so does an IDE and so does a tool like CocoaPods :-)