Add CI & update README

.gitlab-ci.yml

+include: http://rainboard.laas.fr/project/hpp-spline/.gitlab-ci.yml

README.md

 Spline
 ===================
 
+[![Pipeline status](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-spline/badges/master/pipeline.svg)](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-spline/commits/master)
+[![Coverage report](https://gepgitlab.laas.fr/humanoid-path-planner/hpp-spline/badges/master/coverage.svg?job=doc-coverage)](http://projects.laas.fr/gepetto/doc/humanoid-path-planner/hpp-spline/master/coverage/)
+
 
 A template-based Library for creating curves of arbitrary order and dimension, eventually subject to derivative constraints. The main use of the library is the creation of end-effector trajectories for legged robots.
 
@@ -59,6 +62,9 @@ Please refer to the Main.cpp files to see all the unit tests and possibilities o
 
 Installation
 -------------
+
+This package is available as binary in [robotpkg/wip](http://robotpkg.openrobots.org/robotpkg-wip.html)
+
 ## Dependencies
 * [Eigen (version >= 3.2.2)](http://eigen.tuxfamily.org/index.php?title=Main_Page)