Add plotting functionality

code/app/templates/data.html

@@ -4,12 +4,12 @@
 <h1 class="text-center">What do you want to check out?</h1>
 <li>
     <p class="text-center">
-        <a href="{{ url_for('table_selection') }}">Tables</a>
+        <a href="{{ url_for('table_selection') }}" class="btn btn-success" role="button" aria-pressed="true">Tables</a>
     </p>
 </li>
 <li>
     <p class="text-center">
-        <a href="{{ url_for('plots') }}">Plots</a>
+        <a href="{{ url_for('plot_selection') }}" class="btn btn-success" role="button" aria-pressed="true">Plots</a>
     </p>
 </li>
 {% endblock %}