DO NOT MERGE.

From mattly:

So this is a stab at #5 whereby bake isn't handling quoted arguments well. And, I knew I was doing something hacky with bake, but I really had no idea just how hacky. Short of reworking all the types to turn bake ls -la $dir into bake "ls -la $dir", this seems to be the next best thing: escaping quotes on every item in the argument list to bake.

The problem is bake is so central to everything, all for the sake of having nice, stubbable tests, whereby I could test the logic for e.g. apt on my mac, or brew on a linux CI server, without resorting to VMs and whatnot. So now pretty much all of the tests are going to fail and need to have their respond_to and baking_output stuff changed.

Since I'm not even sure this will have the desired effect without breaking everything (it seems to work ok locally) I'd like to get some eyes on it before going to the effort of updating all the tests.