Merge branch 'gitlab' into 'master'

Blackfish is not hosted on Github but now on Gitlab

See merge request !13

README.org

@@ -47,7 +47,7 @@ To use this project you will need at least this list of tools properly installed
 To quickly bootstrap a Swarm cluster with Vagrant on your local machine, configure the [[https://gitlab.com/blackfish/blackfish/raw/master/nodes.yml][nodes.yml]] file and type the following commands.
 
  #+BEGIN_SRC bash
- $ git clone https://github.com/yanndegat/blackfish
+ $ git clone https://gitlab.com/blackfish/blackfish.git
  $ cd blackfish
  $ vi nodes.yml
  ...