Remove Copyright from every source file

Replace it by website link; copyright appears in the LICENSE file already, which is sufficient
diff --git a/examples/using_cpp_libc.py b/examples/using_cpp_libc.py
index 4fdf881..0c70c88 100644
--- a/examples/using_cpp_libc.py
+++ b/examples/using_cpp_libc.py
@@ -5,7 +5,7 @@
 # the 'real' cpp if you're on Linux/Unix) and "fake" libc includes
 # to parse a file that includes standard C headers.
 #
-# Copyright (C) 2008-2015, Eli Bendersky
+# Eli Bendersky [http://eli.thegreenplace.net]
 # License: BSD
 #-----------------------------------------------------------------
 import sys