install.erb in shopify-sinatra-app-0.3.1

- old
+ new

@@ -27,12 +27,14 @@
 
   <div style="margin-top: 30px"></div>
 
   <div class="container">
     <form role="form" class="form-large" action="/login" method="post">
-        <div class="input-append">
-          <input class="form-control form-wide" type="url" name="shop" placeholder="Shop URL">
-          <input class="btn" type="submit" value="Install App" />
+        <div class="input-group form-wide">
+          <input class="form-control" type="url" name="shop" placeholder="Shop URL">
+          <span class="input-group-btn">
+            <input class="btn" type="submit" value="Install App" />
+          </span>
         </div>
     </form>
   </div>
 </body>