Download Niconico Hiroba logs

[AlexAplin]

https://www.beta.hiroba.nicovideo.jp/

Main squares (/squares/<squareId>) and all inner threads (/thread/<id>) seem to have messages embedded in the source. Each thread can pull messages from an API: https://www.beta.hiroba.nicovideo.jp/api/timeline?sourceType=thread&sourceCode=<id>