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

this behavior looks right to me, where it creates a string and passes it into the function call and assigns the result to "selector"...