Fix async debugger issues

[mousetraps]

We should be taking advantage of the --nolazy flag during debugging.

Repro steps:
Node v0.12.7 x64, set breakpoint at console.log line, F5 -> breakpoint resolves to last line instead

(function () {
    var a = "hello world";
    setInterval(function () {
        console.log(a);
    }, 2000);
})();