Build: Updated AUTHORS.txt

Author: gseguin

AUTHORS.txt

@@ -230,4 +230,6 @@ Spencer Oberstadt <soberstadt@gmail.com>
 Richard Pangborn <rpangborn@gmail.com>
 Rocco Georgi <rocco@pavingways.com>
 Hyunsook Park <hspark.dasom@gmail.com>
-Cristi Citea <cristi.catea@gmail.com>
+Cristi Citea <cristi.catea@gmail.com>
+Calvin Tam <calvinyhtam@gmail.com>
+Patrick Stapleton <github@gdi2290.com>