message: Add author name on main page
diff: <table border="0">
  <tr>
  <td width="25%">
  - <b>Author:</b> Cl&eacute;ment Maria, Pawel Dlotko, Vincent Rouvreau<br>
  + <b>Author:</b> Cl&eacute;ment Maria, Pawel Dlotko, Vincent Rouvreau, Marc Glisse<br>
  <b>Introduced in:</b> GUDHI 2.0.0<br>
  <b>Copyright:</b> GPL v3<br>
  </td>
  