Get rid of the splashpage banner photo and "descriptions"

app/assets/javascripts/application.js

@@ -22,6 +22,8 @@
 //= require dashboard
 //= require ahoy
 //= require smoothscroll
+//= require trianglify.min
+//= require tinycolor
 //= require bootstrap-markdown
 //= require to-markdown
 //= require markdown
@@ -30,6 +32,7 @@
 //= require osem-datepickers
 //= require osem-datatables
 //= require osem-tickets
+//= require osem-splash
 
 $(document).ready(function() {
     $('a[disabled=disabled]').click(function(event){

app/assets/javascripts/osem-splash.js

@@ -0,0 +1,7 @@
+$(function () {
+  $(document).ready(function() {
+    var t = new Trianglify({cellsize: 100, x_gradient: triangle_colors });
+    var pattern = t.generate(document.body.clientWidth, ($( "#splash-banner" ).height() + 200 ));
+    $('#splash-banner').css('background-image', pattern.dataUrl);
+  });
+});