Li Jie

Splitted `template exec` to two definitions: ```nim template exec*(args: varargs[string, `$`]; inner: untyped) template exec*(args: seq[string]; inner: untyped) ``` It works.

@juancarlospaco So what is the reason? Does the Nim compiler has a break change? I'm not sure it's a good way, too many template methods need to change.

我先把 RNTester 改成 Promise 方式调用，已经跑起来了。但是 Touchable* 貌似有点问题。