AUTHORS: cleanup

AUTHORS

@@ -4,6 +4,7 @@ to the libgit2 project (sorted alphabetically):
 Alex Budovski
 Alexei Sholik
 Andreas Ericsson
+Anton "antong" Gyllenberg
 Ankur Sethi
 Ben Noordhuis
 Ben Straub
@@ -30,12 +31,14 @@ Jonathan "Duke" Leto
 Julien Miotte
 Julio Espinoza-Sokal
 Justin Love
+Kelly "kelly.leahy" Leahy
 Kirill A. Shutemov
 Lambert CLARA
 Luc Bertrand
 Marc Pegon
 Marcel Groothuis
 Marco Villegas
+Michael "schu" Schubert
 Microsoft Corporation
 Olivier Ramonat
 Peter Drahoš
@@ -47,8 +50,9 @@ Romain Geissler
 Romain Muller
 Russell Belfer
 Sakari Jokinen
-Sam
+Samuel Charles "Sam" Day
 Sarath Lakshman
+Sascha Cunz
 Sascha Peilicke
 Scott Chacon
 Sebastian Schuberth
@@ -61,6 +65,3 @@ Tim Clem
 Tim Harder
 Trent Mick
 Vicent Marti
-antong
-kelly.leahy
-schu