Update contributor agreement page to advise SchedMD contact

doc/html/contributor.shtml

@@ -18,6 +18,12 @@ Suite 201<br>
 Livermore, CA 94550<br>
 USA</p>
 
+<p>Contacting SchedMD before starting any substantial development effort is
+recommended to coordinate development and avoid duplication of effort.
+SchedMD can provide design review, code review, integration and long-term
+support at reasonable cost. SchedMD can also perform custom development work
+to satisfy your requirements.</p>
+
 <p style="text-align:center;">Last modified 9 January 2013</p>
 
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