added user independent sections and started db migration work

templates/sections.html

@@ -4,6 +4,13 @@
         <h2>{{.BodyTitle}}</h2>
     </div>
 </div>
+{{if .Admin}}
+<div class="row mb-3">
+    <div class="col-xs-5">
+        <a class="btn btn-sm btn-primary" href="/section/new"><b>New Section</b></a>
+    </div>
+</div>
+{{end}}
 {{if .Data}}
 <div class="row">
 {{range $index, $item := .Data}}