moving back page to markdown as otherwise it doesn't render it with the top and left rows

Author: kn6yuh

sponsors.html sponsors.mdsponsors.html renamed to sponsors.md

@@ -1,5 +1,5 @@
-<b><center>Sponsors</center></b>
-      
+# Sponsors
+
 <table width="620" border="0" align="center" cellpadding="0" cellspacing="0">
   <tr>
     <td>&nbsp;</td>