LINE 推播 (Push Message)

分析官方的範例：

HTTP目的地 : 

    https://api.line.me/v2/bot/message/push

HTTP表單方法 : 

    POST

HTTP標頭 : 

    Content-Type: application/json

    Authorization: Bearer 權杖

HTTP內文 : 

    {

        "to": "U4af4980629...",

        "messages":

        [

            {"type":"text" , "text":"Hello, world1"},

            {"type":"text" , "text":"Hello, world2"}

        ]

    }