add a readme

README.md

+
+BLC program
+===========
+
+Copyright : [ETIS](http://www.etis.ensea.fr/neurocyber) - ENSEA, University of Cergy-Pontoise, CNRS (2011-2016)  
+Author    : [Arnaud Blanchard](http://arnaudblanchard.thoughtsheet.com)  
+Licence   : [CeCILL v2.1](http://www.cecill.info/licences/Licence_CeCILL_V2-en.html)  
+
+###Library providing command line program facilities
+- Parsing arguments
+- Interacting with the user
+
+### [Online documentation](https://framagit.org/blaar/blc_program/wikis/home)
+### [API](doc/api/index.html)
+(need doc to be compiled in blaar_dir :`./doc.sh blc_program`)
+