Update README.md

README.md

-==Installation du code==
-        git clone (ssh)        --depuis gitlab/immc dans HOME
-        cd marblesbag/marblesbag
-        make
-        gedit ~/.bashrc
-                => export PYTHONPATH=$HOME/Documents/marblesbag:$PYTHONPATH 
+Installation
+============
++ Go to the gitlab/immc project to upload your ssh or https link
++ Open your terminal and type the following commands
+
+    git clone https://username@git.immc.ucl.ac.be/fluidparticles/marblesbag.git
+    cd marblesbag/marblesbag
+    make
+    gedit ~/.bashrc
+
++ Write the following line in your bashrc
+
+    export PYTHONPATH=$HOME/Documents/marblesbag:$PYTHONPATH 
         
-==Compilation de la visu==
+Using the inerface to show resutls
+==================================
+
         cd HOME/marblesbag/scontactplot
         mkdir build
         cd build
@@ -14,7 +23,8 @@
         gedit ~/.bashrc
                 => export PATH=$HOME/Documents/marblesbag/scontactplot/build:$PATH
                 
-==Cas tests prets a l'emploi==
+Testcases ready to use
+======================
         -couette-2d:
                 beton.py
                 melangeur.py