Merge branch 'develop' of github.com:tracim/tracim_v2 into develop

frontend/src/container/Login.jsx

           </div>
 
           <footer className='loginpage__footer'>
-            <div className='loginpage__footer__text whiteFontColor'>
-              copyright © 2013 - 2018 tracim project.
+            <div className='loginpage__footer__text d-flex align-items-center flex wrap'>
+            copyright © 2013 - 2018 <a href='http://www.tracim.fr/' target='_blank' className='ml-3'>tracim.fr</a>
             </div>
           </footer>
 

frontend/src/css/Login.styl

     &__text
       width 310px
       font-size 17px
+      color off-white
+      & > a
+        color off-white
+        font-size 19px
+        &:hover
+          text-decoration underline
 
 @media (min-width: min-lg) and (max-width: max-lg)
   .loginpage