AUTHORS: Add more contributors

and fix typo

Author: amitdo

AUTHORS

@@ -9,6 +9,7 @@ Simon Crouch
 David Eger
 Sheelagh Huddleston
 Dan Johnson
+Rajesh Katikam
 Thomas Kielbus
 Dar-Shyang Lee
 Zongyi (Joe) Liu
@@ -28,13 +29,14 @@ Ping Ping Xiu
 Andrew Ziem
 Oscar Zuniga
 
-Community Contributers:
+Community Contributors:
 Zdenko Podobný (Maintainer)
 Jim Regan (Maintainer)
 James R Barlow
 Amit Dovev
 Martin Ettl
 Tom Morris
+Tobias Müller
 Egor Pugin
 Sundar M. Vaidya
 Stefan Weil