New contributors file, without selfish mode on

CONTRIBUTORS

@@ -2,8 +2,18 @@ The following is a list of people who have contributed ideas, code, bug
 reports, or in general have helped logstash along its way.
 
 Contributors:
+* Avishai Ish-Shalom (avishai-ish-shalom)
+* Bernd Ahlers (bernd)
 * Colin Surprenant (colinsurprenant)
+* Gang Chen (goncha)
+* Jordan Sissel (jordansissel)
+* Jurjan Woltman (jwoltman)
+* Kurt Hurtado (kurtado)
+* Matt Dainty (bodgit)
+* Pete Fritchman (fetep)
+* Pier-Hugues Pellerin (ph)
 * Richard Pijnenburg (electrical)
+* davux (davux)
 
 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