Add slideshare link

Dependencies

• [2] 5LKTNB6O LOTS of progress
• [3] UH3YXOLF Start the slide deck

Change contents

• replacement in index.html at line 124
  [3.29505185]→[2.4217066:4217138](∅→∅)
  − <td style="vertical-align: middle;"><a href="#">FINAL:</a></td>
  [3.29505185]

  [3.29505255]
  + <td style="vertical-align: middle;"><a href="http://bit.do/git-talk-vdathens">http://bit.do/git-talk-vdathens</a></td>