Merge pull request #391 from Smartmessages/develop

Clean up, use self-closing tags in XHTML

diff --cc scss/components/_button.scss
Simple merge

diff --cc scss/components/_visibility.scss
Simple merge

diff --cc test/visual/pages/basic.html
index df65455342c2895bc50a51139e85b8fa3e2bb735,aaf1b68dc5b69090d02c63c0fd348643b80c306e..fced733912e3badd478eea211bfb2f9899574411
--- 1/test/visual/pages/basic.html
--- 2/test/visual/pages/basic.html
+++ b/test/visual/pages/basic.html
@@@ -14,13 -14,13 +14,13 @@@
  <container>
    <row>
      <columns>
-       <br>
+       <br/>
        <center>
 -        <img src="http://placehold.it/200x50">
 +        <img class="hide-for-large" src="http://placehold.it/200x50">
        </center>
-       <br>
+       <br/>
        <h1>Hi, Susan Calvin</h1>
 -      <p class="lead">Lorem ipsum dolor sit amet, consectetur adipisicing elit. Magni, iste, amet consequatur a veniam.</p>
 +      <p class="lead">YO YOY Lorem ipsum dolor sit amet, consectetur adipisicing elit. Magni, iste, amet consequatur a veniam.</p>
        <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Ut optio nulla et, fugiat. Maiores accusantium nostrum asperiores provident, quam modi ex inventore dolores id aspernatur architecto odio minima perferendis, explicabo. Lorem ipsum dolor sit amet, consectetur adipisicing elit. Minima quos quasi itaque beatae natus fugit provident delectus, magnam laudantium odio corrupti sit quam. Optio aut ut repudiandae velit distinctio asperiores?</p>
        <callout class="primary">
          <p>Lorem ipsum dolor sit amet, consectetur adipisicing elit. Reprehenderit repellendus natus, sint ea optio dignissimos asperiores inventore a molestiae dolorum placeat repellat excepturi mollitia ducimus unde doloremque ad, alias eos!</p>