Integrate with CI & docs

[freedomofkeima]

I'm thinking of integrating this repository with CI (Travis, Jenkins, CircleCI, etc) and readthedocs. For each commit to master, we will run the tests and update the documentation with the latest generated svg files.

[freedomofkeima]

@dimaqq if you're okay, I'll help you out with this idea. Do you have any CI preference or documentation hosting other than readthedocs? 👀

[dimaqq]

Rtd is fine :I hang CI is fine :)