Add Maintainers to README

See https://github.com/celery/celery/issues/2534

README.rst

@@ -395,6 +395,21 @@ Wiki
 
 http://wiki.github.com/celery/celery/
 
+
+.. _maintainers:
+
+Maintainers
+===========
+
+- @ask (primary maintainer)
+- @thedrow
+- @chrisgogreen
+- @PMickael
+- @malinoff
+- @raghuramos1987
+- And you? We really need more: https://github.com/celery/celery/issues/2534 
+
+
 .. _contributing-short:
 
 Contributing