tools: fix a couple of HTML/CSS validation errors in the status page

Also update reset.css and text.css from the Unsemantic project
https://github.com/nathansmith/unsemantic/tree/master/assets/stylesheets

Change-Id: I8f6292461f13902d39b511399515b3efdf50c8c5
diff --git a/tools/nfd-status-http-server-files/text.css b/tools/nfd-status-http-server-files/text.css
index b115a70..3a7e062 100644
--- a/tools/nfd-status-http-server-files/text.css
+++ b/tools/nfd-status-http-server-files/text.css
@@ -1,15 +1,10 @@
-/*
-  960 Grid System ~ Text CSS.
-  Learn more ~ http://960.gs/
-
-  Licensed under GPL and MIT.
-*/
-
-/* `Basic HTML
-----------------------------------------------------------------------------------------------------*/
-
 body {
-    font: 13px Arial, Helvetica, sans-serif;
+  font: 13px / 1.5 "Helvetica Neue", Arial, "Liberation Sans", FreeSans, sans-serif;
+}
+
+pre,
+code {
+  font-family: "DejaVu Sans Mono", Monaco, Consolas, monospace;
 }
 
 hr {
@@ -19,33 +14,18 @@
   height: 0;
 }
 
-/* `Headings
-----------------------------------------------------------------------------------------------------*/
-
 h1 {
-	font-size: 2.4em;
+  font-size: 25px;
 }
 
 h2 {
-	font-size: 1.8em;
+  font-size: 23px;
 }
 
 h3 {
-	font-size: 1.4em;
+  font-size: 21px;
 }
 
-/* h1 { */
-/*   font-size: 25px; */
-/* } */
-
-/* h2 { */
-/*   font-size: 23px; */
-/* } */
-
-/* h3 { */
-/*   font-size: 21px; */
-/* } */
-
 h4 {
   font-size: 19px;
 }
@@ -58,20 +38,17 @@
   font-size: 15px;
 }
 
-/* `Spacing
-----------------------------------------------------------------------------------------------------*/
+ol {
+  list-style: decimal;
+}
 
-/* ol { */
-/*   list-style: decimal; */
-/* } */
+ul {
+  list-style: disc;
+}
 
-/* ul { */
-/*   list-style: disc; */
-/* } */
-
-/* li { */
-/*   margin-left: 30px; */
-/* } */
+li {
+  margin-left: 30px;
+}
 
 p,
 dl,
@@ -89,18 +66,5 @@
 address,
 fieldset,
 figure {
-  margin-bottom: 10px;
+  margin-bottom: 20px;
 }
-
-pre {
-    /* padding: 0px 24px; */
-    white-space: pre-wrap;
-    background-color: #F9F9F9;
-    border: 1px dashed #2F6FAB;
-    color: black;
-    padding: 1em;
-    font-size: 13px;
-}
-code {
-    font-family: Consolas, Monaco, Andale Mono, monospace;
-}
\ No newline at end of file