Merge branch 'header-spacing' into 'master'

More room and better grouping for <h*> tags

See merge request !3

adapt.css

@@ -51,9 +51,12 @@ The content `<div>` is where all your content goes.
   color: black;
   font-size: 2em;
   font-weight: 300;
-  margin: 0.6em -1em;
-  padding: 1em 1em 0.5em;
-  line-height: 90%;
+  margin: 0.6em -1em 1.2em;
+  padding: 1em 1em 0.3em;
+  line-height: 95%;
+}
+#wikitext h2, #wikitext h3, #wikitext h4, #wikitext h5, #wikitext h6, #wikitext h7 {
+  margin-top:2em;
 }
 #wikitext img {
   max-width:100%;
@@ -76,6 +79,7 @@ hr { /* make <hr> 1px wide and LUH-green */
   border-color: #c8d317;
   border-style: solid;
   border-width: 1px 0 0 0;
+  margin: 2em -0.8em;
 }
 /* Wiki page actions */
 #wikicmds {