Fix generated controllers to use proxying controllers

[mmun]

Fixes #13.

[rwjblue]

@mmun - Test failures are without legacy views:

not ok 1 Chrome 62.0 - [216 ms] - Generated controllers: object controllers are generated correctly
    ---
        actual: >
            
        expected: >
            Alice
        stack: >
                at DOMAssertions.hasText (http://localhost:7357/assets/test-support.js:9508:20)
                at _callee$ (http://localhost:7357/assets/tests.js:22:50)
                at tryCatch (http://localhost:7357/assets/vendor.js:411:40)
                at Generator.invoke [as _invoke] (http://localhost:7357/assets/vendor.js:685:22)
                at Generator.prototype.(anonymous function) [as next] (http://localhost:7357/assets/vendor.js:444:21)
                at asyncGeneratorStep (http://localhost:7357/assets/tests.js:6:105)
        message: >
            Element [data-test-target] has text "Alice"
   

[mmun]

Yeah, the included logic is wrong. I'll fix that.