batch replace grid- (scratch) by col- (bootstrap)

hand replace
* push- by offset-
* no-gutter by g-0

add breakpoints md- and sm-

src/Bundle/ChillMainBundle/Resources/views/Timeline/index.html.twig

@@ -2,7 +2,7 @@
 
 {% block content %}
   <div id="container content">
-    <div class="grid-8 centered">
+    <div class="col-8 centered">
       <h1>{{ 'Global timeline'|trans }}</h1>
 
       {{ timeline|raw }}