updates to ElixirConf link for 2019.

Author: jfreeze

_includes/important-links.html

@@ -1,15 +1,15 @@
 <divclass="widget">
-<ahref="https://elixirconf.com/" target="_blank" style="text-decoration: none;">
-<imgsrc="https://elixirconf.com/2017/images/resources/2017-elixirconf-logo-wide.png" width="190" title="ElixirConf logo" style="border:0; margin-left:-4px">
-</a>
-<br/>
-<ahref="https://elixirconf.com/" target="_blank">ElixirConf™ US</a> is being held in Bellevue, WA, September 5-8.
-<br/>
-The <ahref="https://elixirconf.com/#cfp" target="_blank">CFP</a> is now open and <ahref="https://elixirconf.com/#registration">discount registration</a> is available.
-</div>
-
-<divclass="widget">
-<h3class="widget-title">Join the Community</h3>
+<divclass="widget">
+<aclass="spec" href="https://elixirconf.com/" target="_blank">
+<imgsrc="https://elixirconf.com/2018/images/resources/elixirconf-logo-brand-dk.png" width="190" title="ElixirConf logo" style="border:0; margin-left:-4px">
+</a>
+<br/>
+<aclass="spec" href="https://elixirconf.com/" target="_blank">ElixirConf<sup>®</sup></a> is at the Gaylord Rockies Resort, Aurora CO, August 27-30.
+ Early Bird Registration opens May 15.
+</div>
+</div>
+<divclass="widget">
+<h3class="widget-title">Join the Community</h3>
 <ul>
 <li><aclass="spec" href="irc://irc.freenode.net/elixir-lang">#elixir-lang on freenode IRC</a></li>
 <li><aclass="spec" href="http://elixirforum.com">Elixir Forum</a></li>