Update README.md

README.md

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 This package development is stalled. If another robotics package evolve enough, I'll be happy to transfer the name "Robotics.jl" (which is not registered).
 
+[![Project Status: Abandoned – Initial development has started, but there has not yet been a stable, usable release; the project has been abandoned and the author(s) do not intend on continuing development.](http://www.repostatus.org/badges/latest/abandoned.svg)](http://www.repostatus.org/#abandoned)
 [![Build Status](https://travis-ci.org/cdsousa/Robotics.jl.svg?branch=master)](https://travis-ci.org/cdsousa/Robotics.jl)
 [![Coverage Status](https://coveralls.io/repos/github/cdsousa/Robotics.jl/badge.svg?branch=master)](https://coveralls.io/github/cdsousa/Robotics.jl?branch=master)