Handle client dispatch asynchronously
Handle client dispatch asynchronously

At the moment, we yield to the client call in jiyuubot/clients.vala. By
using begin() instead, we can get the ball rolling quicker by having
clients launch in parallel.

Bob131/JiyuuBot,Bob131/JiyuuBot-ng,Bob131/JiyuuBot-ng,Bob131/JiyuuBot-ng