Updated contributors list

Updated contributors list with leadership team and a few newer contributors. More changes to come.

CONTRIBUTORS.md

@@ -1,11 +1,16 @@
-This project was made possible through the hard work of many people:
+This project was made possible through the hard work of many people. Our leadership team is composed of:
+* Jannie Lung
+* Ranjani Prabhakar
+* Soren Spicknall
+* Viktor Koves
+
+Code has been contributed by the following other team members:
 * Robert Altman
+* Dave Alvarado
 * CJ Bennett
 * Grant Reszczyk
-* Soren Spicknall
-* Viktor Koves
 
-Our non-technical team has also included the following valued contributors over time:
+Our non-technical teams have also included many valued contributors over time, including the following:
 * Julian Hyde
 * Justin Jones
 * Steven Vance