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

and here we're just eval'ing the code since it's a JS method on String. Again looks right to me.