py, unix: Add copyright for modules I worked closely on.
diff --git a/py/objstr.c b/py/objstr.c
index 79ad891..3a4b0b9 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -4,6 +4,7 @@
  * The MIT License (MIT)
  *
  * Copyright (c) 2013, 2014 Damien P. George
+ * Copyright (c) 2014 Paul Sokolovsky
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal