New contributors file, without selfish mode on

Author: ph

CONTRIBUTORS

@@ -2,7 +2,15 @@ The following is a list of people who have contributed ideas, code, bug
 reports, or in general have helped logstash along its way.
 
 Contributors:
+* Dan Peterson (dpiddy)
+* John E. Vincent (lusis)
+* Jordan Sissel (jordansissel)
+* João Duarte (jsvd)
+* Kurt Hurtado (kurtado)
+* Pete Fritchman (fetep)
 * Pier-Hugues Pellerin (ph)
+* Richard Pijnenburg (electrical)
+* hantuo (hantuo)
 
 Note: If you've sent us patches, bug reports, or otherwise contributed to
 Logstash, and you aren't on the list above and want to be, please let us know