Introduce CSP headers to Kalamar (start of #72)

Change-Id: I84b7ff0accab3d783ad653fae123c25fee1d92b9
diff --git a/dev/scss/base/base.scss b/dev/scss/base/base.scss
index 2ad7b95..be195e3 100644
--- a/dev/scss/base/base.scss
+++ b/dev/scss/base/base.scss
@@ -81,6 +81,10 @@
   clear: both;
 }
 
+iframe {
+  border-width: 0;
+}
+
 blockquote {
   border-radius:    $standard-border-radius;
   padding:          2pt 5pt 2pt 20pt;