Porting circusweb to SockJs.Torando.

torandio2 is no longer maintained, so Python 3.0 is not been added. This means
that circus-web doesn't work under (see Issue #43).

From the torandio2 README.rst
> Unfortunately, Socket.IO 0.8 branch is abandoned, there are huge amount of
> bugs and nothing getting fixed. I would suggest to look at alternative
> options, for example SockJS <http://github.com/sockjs/>. There's
> sockjs-tornado <http://github.com/mrjoes/sockjs-tornado/> too. I don't plan
> to support TornadIO2 anymore, assuming that parent library is no longer
> maintained.

Following the example provided by seesaw-kit
https://github.com/ArchiveTeam/seesaw-kit/issues/40
Adding a Python 3.0 test target.