Enable continuous integration / run unit test

[s-celles]

Hello,

Ensuring that this library can still be compiled (using a continuous integration service such as Travis) could be a nice improvement.

Running some unit tests to ensure that code works correctly could help to ensure that contribution doesn't break anything.

I have been using https://github.com/ianfixes/arduino_ci recently, (this is quite new in Arduino library development). It can help to achieve this.

Are you interested in a pull request to enable such a feature? If so I can submit it.

Kind regards

[madleech]

Sorry, didn't see your message till now. Yes, that sounds good, interested to see what the overhead is.