More calls to action on home.tmpl (#46)

* More calls to action on home.tmpl

This adds the "Sign in with GitHub" to several sections higher up on the page. Assuming some people won't need or want to read all the way the end to register.

* additional Updates to home.tmpl

Per review:

* changes "Lets get started" link to skip scroll
* moves auth link from "About" section to the next step in the steps
* Changes HR color

* last Updates home.tmpl 

Puts "Get Started" section "get started" button into a row div.

* Changes to "Getting Started" section 

based on @jcbwlkr's request

templates/home.tmpl

@@ -27,7 +27,7 @@
           <a class="nav-link js-scroll-trigger" href="#projects">Projects</a>
         </li>
         <li class="nav-item">
-          <a class="nav-link js-scroll-trigger" href="#lets-do-this">Let's Do This!</a>
+          <a class="nav-link" href="/auth/github">Let's Do This!</a>
         </li>
       </ul>
     </div>
@@ -40,6 +40,8 @@
 
 <div class="call-to-action section-light" id="sponsors">
   <div class="container text-center">
+    <a class="btn btn-large btn-dark sr-button" href="/auth/github">Sign In with GitHub <i class="fa fa-github"></i></a>
+    <hr class="dark">
     <h2 class="section-heading">Sponsors</h2>
     <hr class="dark">
     <p>
@@ -128,8 +130,11 @@
           <p class="text-justify">After four pull requests, you are eligible to receive a free t-shirt!</p>
         </div>
       </div>
+     </div>
+     <div class="mt-5 text-center">
+        <a class="btn btn-large btn-dark sr-button" href="/auth/github">Sign In with GitHub <i class="fa fa-github"></i></a>
     </div>
-  </div>
+</div>
 </section>
 
 <div class="call-to-action section-dark" id="projects">