place "Article Footer" top on small screen

This commit reverts: aad2252ebbec06aee8cf8fc535d1e08aad607bb0
update dependencies
use microclearfix_block
fix "Posts" footer position
add CSS Lint options
fix unwanted top margin in "Posts" on Chrome

Auto-breaking should be applied only on paragraph.
follow footer markup updates

Before:
    <footer role="contentinfo">
      <section class="footlinks">
        <ul>...</ul>
      </section>
      <address>...</address>
      <section class="elsewhere">
        <ul>...</ul>
      </section>
    </footer>

After:
    <footer role="contentinfo">
      <section class="footlinks">
        <ul>...</ul>
      </section>
      <address>
        <p class="byline">...</p>
        <ul class="elsewhere">...</ul>
      </address>
    </footer>
fix "Social Buttons" unreadable text

The text "Tweet" is unreadable when Twitter share button is not
rendered.
bring "Hanging Block" to the front

Some widget cannot click/touch e.g. "Paging".
fix "Share Buttons" position

The box using `display: inline-table` cannot set margins on Internet
Explorer 11 and Firefox 25.
version 6.43.8