update dependencies

requirements.txt

@@ -2,3 +2,4 @@ git+https://github.com/buxx/synergine.git
 git+https://github.com/buxx/synergine_xyz.git
 git+https://github.com/buxx/AntStar.git
 tmx==1.2.3
+Pillow==2.8.1

tests_requirements.txt

@@ -2,3 +2,4 @@ git+http://github.com/buxx/synergine.git
 git+http://github.com/buxx/synergine_xyz.git
 git+https://github.com/buxx/AntStar.git
 tmx==1.2.3
+Pillow==2.8.1