MoonScript版的Ngx.Timer
作者：糖果
实际如果是直接调用ngx.timer的API，moonscript和lua的ngx.timer的函数写法差别不是很大。
candylab.moon
handler = (fill, params)->
ok, err = ngx.timer.at(1, handler, "params-data")
ngx.log(ngx.DEBUG, "ok:", ok, " err:", err)
ok, err = ngx.timer.at(6, handler, "params-data")
if not ok then
ngx.log(ngx.ERR, "err:", err)
candylab.lua
local http = require("lapis.nginx.http")
local handler
handler = function(fill, params)
local ok, err = ngx.timer.at(1, handler, "params-data")
ret ...
