CI Travis, regression testing, and github badges

[amamory]

Github has something called badges. There are few useful badges that give to the viewer more confidence about the design. This is a list of some of the most relevant ones:

• CI Travis. https://github.com/richelbilderbeek/travis_cpp_tutorial
• Docs
• coverage https://github.com/richelbilderbeek/cpp/blob/master/content/CppCodecov.md
• DOI https://zenodo.org/record/2525346
• license

here are few examples of repos with badges
https://github.com/amamory/seriation
https://github.com/lsa-pucrs/donnie-assistive-robot-sw
https://github.com/disaster-robotics-proalertas/usv_sim_lsa

For CI, it would be nice that there were few test applications (UNIT Testing?!?!)
so we can quickly assess the results of regression testing.