Best Practies

## Another one

Prefer `func()` style function declarations on interfaces instead of `func:Function` as they allow overriding i.e. **DO**

``` ts
interface Foo{
    take():number;
    take(num:number):void;
}
```

instead of 

``` ts
interface Foo {
    take: () => number;
    // No way to define this now, 
    take(num: number): void; // Error : duplicate identifier
}
```
