Support that exported table are inserted directly below
or above the text table.
eg.
<!--
+------------------------------------------------------------------+
| User Visible Entry Points
|
+-------------------------------+----------------------------------+
| Function |
Description |
+-------------------------------+----------------------------------+
-->
<!-- This HTML table template is generated by
`table.el' version 1.5.53 START -->
<TABLE border="1">
<CAPTION>Table</CAPTION>
<TR>
<TD colspan="2" align="center" valign="top">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;User&nbsp;Visible&nbsp;Entry&nbsp;Points&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</TD>
</TR>
<TR>
<TD align="center" valign="top">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Function&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</TD>
<TD align="center" valign="top">
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Description&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
</TD>
</TR>
</TABLE>
<!-- This HTML table template is generated by
`table.el' version 1.5.53 END -->