Use newer flowdock api package
Send messages sequentially

Make sure first message is sent before sending the next to preserve order.

Fixes #54.
Use api to determine bot name

Uses Flowdock user id's to determine which messages are the bot's own.

Adds a warning if bot name is configured wrong.

Tries to mitigate effects of badly configured name.

Fixed #59.
Strip username when replying in private, better logging, fix reply

Fixes #61.