[Errors] function overloads and implementation declared out of order

[mhegazy]

class d {
    private foo(n: number): string;
    private foo(ns: any) {
        return ns.toString();
    }
    private foo(s: string): string;
    //!!! Function implementation expected.
}

class e {
    private foo(ns: any) {
        return ns.toString();
    }
    private foo(s: string): string;
    private foo(n: number): string;
    //!!! Function implementation expected.
}

Expected: errors as noted above

Actual: no errors

[vladima]

Fixed in #197