Some cleaning 😢

server/controllers/intro/views/index.jade

@@ -0,0 +1,20 @@
+extends ../../../views/base.jade
+
+block content
+    h1 Welcome !
+    p This study consists in four consecutive steps :
+        ol
+            li Enter some personal information that we will use for statistics purposes
+            li Complete a tutorial to learn how to use the 3D navigation interface
+            li Play a game in which you have to find coins hidden in a 3D world. You need to play the game in 3 different scenes.
+            li Complete a short questionnaire to give us feedback on the 3D navigation interface
+    h2#start
+
+block extrajs
+    script.
+        var isOpera = window.navigator.userAgent.indexOf("OPR") > -1 || window.navigator.userAgent.indexOf("Opera") > -1;
+        if (($.browser.chrome || $.browser.mozilla) && !isOpera) {
+            $('#start').html('You can now <a href="/user-study">start when you are ready</a>');
+        } else {
+            $('#start').html('Sorry, your browser is not compatible... please try again with Firefox or Chrome');
+        }