Release of Gambas 1.9.39

The main changes are:
<ul>
  <li>The SDL component has been redesigned. It now uses OpenGL for 2D and
  3D drawing.
  <li>The bugs introduced in Drag &amp; Drop, Window.Close method in 1.9.38 
  were fixed.
  <li>The ScrollView now behaves correctly when its arrangement property is set.
  <li>The <tt>gb.db.form</tt> component was fixed.
</ul>
<p>
See the <a href="changelog2.html">ChangeLog</a> for the other bug fixes and changes.