Reduce font size across site

- add LinkedIn to resume
- fix Unicode expand icon not showing on mobile
- change footer background to line above

layouts/shortcodes/resume/education.html

@@ -0,0 +1,12 @@
+<div class="education">
+  <div class="row">
+    <div class="col-8 text-left">
+      <p class="institution">
+        {{ .Get "name" }}
+      </p>
+    </div>
+    <div class="col text-right date">{{ .Get "date" }}</div>
+  </div>
+  {{ .Get "title" }}
+</div>
+</div>