set the send_json_response default data is {}
update Yabby.del_tweet
update Yabby.del_comment
Add Yabby.del_channel
update Yabby.del_channel_tweet
Add DELETE /tweets/:tweet_id
Add DELETE /tweets/:tweet_id/comments/:comment_id
rename GET /channel/:urlname_or_channel_id -> GET /channel/:urlname_or_channel_id/tweets
Add POST /channel
Add DELETE /channel/:urlname_or_channel_id
Add POST /channel/:urlname_or_channel_id/tweets
Add DELETE /channel/:urlname_or_channel_id/tweets