ir_issues

I started writing some specs to point out IR bugs. Unfortunately I'm not really sure what the generated native code _should_ look like for these cases!

This PR is really meant more as a code/conversation starter for pointing out places where IR is failling down and breaking examples. See appcelerator/hyperloop-ios#49

Here's where it starts to get interesting. Here we should be evaling the value we want to assign, and then assign to the "str". I don't think that we do. I think we take the full thing and eval all of it. Maybe that's ok?