Link "Find Data" button to advanced search

Link the "Find Data" button on the home page directly to the Advanced
Search interface of the Data Portal, rather than the intermediary page
containing links to the 3 search engines through which EDI data can be
found. Do this to provide the user a more stream lined and intuitive
experience.

The original rational for linking to an intermediary page was to
highlight the extra effort we put forth to make EDI data findable.
However, such information is provided else where in the website.

templates/index.html

@@ -16,7 +16,7 @@
                 <!--buttons-->
                 <div class="call-to-action">
                     <a class="btn btn-secondary btn-lg" href="/data/publish-data" role="button">Publish Data</a>
-                    <a class="btn btn-secondary btn-lg" href="/data/find-data" role="button">Find Data</a>
+                    <a class="btn btn-secondary btn-lg" href="https://portal.edirepository.org/nis/advancedSearch.jsp" rel="noopener noreferrer" target="_blank" role="button">Find Data</a>
                 </div>
                 <br/>
             </div>